Republic of the Philippines

Department of Education
National Capital Region
DIVISION OF CITY SCHOOLS – MANILA
Manila Education Center Arroceros Forest Park
Antonio J. Villegas St. Ermita, Manila

Electrical Installation
and Maintenance (EIM)
Grade 10

Quarter 1 Week 4
Module 4

REPLACING AUXILIARY PART OF ELECTRIC AND

HYDRAULIC TOOLS ACCORDING TO
MANUFACTURERS SPECIFICATION
(TLE_IAEI9-12ET-If-j-2)

0
HOW DO YOU USE THIS MODULE?

Before starting the module, I want you to set aside other tasks that
will disturb you while enjoying the lessons. Read the simple instruction below
to successfully enjoy the objectives of this kit. Have fun!

1. Follow carefully all the contents and instructions indicated in every

page on this module
2. Write on your notebook or any writing pad the concepts about the
lessons. Writing enhances learning, which is important to develop and
keep in mind.
3. Perform all the provided activities in the module.
4. Let you facilitator/guardian assess your answers.
5. Analyze conceptually the post-test and apply what you have learned.
6. Enjoy studying!

PARTS OF THE MODULE

• Expectations - These are what you will be able to know after

completing the lessons in the module.
• Pre-test - This will measure your prior knowledge and the
concepts to be mastered throughout the lesson.
• Looking Back - This section will measure what learnings and
skills that you understand from the previous lesson.
• Brief Introduction-This section will give you an overview of the
lesson.
• Activities- These are activities designed to develop critical thinking
and other competencies. This can be done with or without a partner
depending on the nature of the activity.
• Remember - This section summarizes the concepts and
applications of the lessons.
• Checking your Understanding - It will verify how you learned
from the lesson.
• Post-test - This will measure how much you have learned from the
entire module.

1
 LESSON 1: REPLACING AUXILIARY PART OF ELECTRIC AND
HYDRAULIC TOOLS ACCORDING TO MANUFACTURER’S
SPECIFICATION.

EXPECTATIONS
Upon completion of the module, learners should be able to:
• replace auxiliary part of electrical power tools; and
• replace auxiliary part of hydraulic tools

PRE - TEST

Directions: Read each question and answer choice carefully and choose the
best answer. Write your answer on the space provided.

1. Hands and arms should be protected by wearing ________when using

portable disc grinder.
a. Gloves
b. Long sleeved shirt
c. Long sleeved leather jacket
d. Long sleeved leather gloves
2. What type of drill speed is needed for most drilling operations?
a. High c. Medium-high
b. Low d. Medium-low
3. To prevent seizing when drilling, the operator should_________.
a. Lubricate the drill bit
b. Reduce the rpm’s of the portable electric drill
c. Reduce the feed pressure when the bit is about to finish drilling.
d. Used the high speed drill bit
4. This is the most common problem of electrical power tools and hydraulic
tools.
a. Dirt c. Lubrication
b. Grit d. Source/ electrical power
5. The purpose of moving the drill and the bit up and down often while
drilling deep hole is to ______________.
a. Give the drill operator better drilling leverage.
b. Help keep the hole centered
c. Reduce overheating in the drill bit.
d. Ream the hole slightly larger
6. The purpose of turning the drill on before attempting to drill a hole is to
____.
a. Check if the power cord is good
b. Make sure the chuck key has been removed
c. See if the drill bit is running true
d. See if the drill operates

2
7. The purpose of a pilot hole when drilling is to _______.
a. Allow the final hole to be drilled at a faster revolution per minute(rpm)
and to finish smoothly
b. Guide the final drilling operation and achieved a more accurately place
hole.
c. Make the final hole drilling operation
d. Reduce the feed pressure needed to drill a hole.
8. __________ is used to drive the pressurized oil.
a. Hydraulic hose c. Hydraulic pump
b. Hydraulic oil d. Hydraulic ram
9. Is where chip of material being drilled break and fly off the material while it
is being work?
a. Cleaning c. Lubrication
b. Chuck d. sprawling
10. Do not use a heat gun near ________________ materials/atmospheres.
a. Cement c. Metal
b. Flammable d. Solid
11. In adding hydraulic oil of hydraulic pipe bender. What type of hydraulic oil
should be used?
a. Baking oil c. Low quality oil
b. Crane oil d. Tellus 32 Oil
12. a tool used for drilling holes in different materials or for connecting
different materials together Is?
a. Heat gun c. Portable Grinder
b. Portable Power Drill d. Portable Threader
13. What personal protective equipment should be worn when operating
portable disc grinder?
a. Safety Glasses
b. Safety Glasses and hearing protection
c. Safety glasses, hearing protection and gloves
d. Safety glasses, hearing protection, gloves and respirator.
14. What can the operator do to avoid hand and finger fatigue when using the
disc grinder for extended periods of time?
a. Drink plenty of water
b. Eat lots of carbohydrates
c. Use the switch lock
d. Wear Long sleeve gloves
15. What are the possible solution if the drill bit stop drilling?
a. Bit jamming c. Material buildup and bit jamming
b. Lubrication d. Material Maintenance

3
LOOKING BACK TO YOUR LESSON

Lubricate Tools
1.

https://www.etftrends.com/crude-oil-and-crude-etfs-
sink-on-renewed-supply-concerns/

2.

https://www.indiamart.com/proddetail/premium-gel-
grease-19716114773.html
3.

https://www.nanotrun.com/info/molybdenum-
disulfide-the-king-of-solid-lubricants-i00068i1.html
4.

https://www.turtlewax.com/our-products/renew-
restore/turtle-wax-chrome-polish-rust-remover/

5.

https://www.wd40.com/products/dry-lube/

6.

https://www.mylucasoil.com/products/penetrating-oil-
aerosol

4
BRIEF INTRODUCTION

Tools are inspected and must have reported to the teacher. Proper
checking of tools is a must before doing the task so that the lubrication and auxiliary
parts are per enterprise specification.

This module consists of two (2) learning outcomes that covers the
knowledge and skills in replacing auxiliary part of electric and hydraulic tools.

COMMON ELECTRICAL POWER TOOLS

Tool is an object used to extend the ability of an individual to modify

features of the surrounding environment. Tools are used to increase the speed,
accuracy and power in doing work.

Main advantages in using proper tools:

1. With the help of power tools, you can get your work done at high speed.
2.The next big advantage of using power tools is that they are very much
effective in comparison to other tools
3. Working with power tools may also get your work done faster.
4. Power Tools are most effective for repair and construction tasks.

Safety tips in using electrical power tools:

1.Keep floors dry and clean to avoid slipping while working with or around
dangerous tools.
2. Keep cords from presenting a tripping hazard.
3. Never carry a power tool by its cord.
4. Use tools that are double-insulated or have a three-pronged cord and are
plugged into a grounded receptacle.
5. Do not use electric tools in wet conditions unless they are approved for that
use.
6. Use a ground fault circuit interrupter (GFCI) or an assured grounding

5
A cordless drill is a power drill that uses rechargeable batteries instead of
a corded plug for power. An impact drill combines rotational power with
concussive power. An impact drill is like a cordless drill in that it rotates and
drives the screw inwards.

Each part of a power drill can be subject to repair so being able to identify
which part needs to be worked on can be a useful skill. Parts of a power drill
include:

1. Power source • Sometimes

accelerated by pulling
• Cord or battery
all the way
• Usually located at the
4. Reverse Switch
back of the grip

2. Chuck • Control bit spin

direction
• Insertion point of drill
• Forward for drilling
bit
into, and reverse for
• A mechanism which
extracting
you fasten the drill bit
5. Drill shaft
or the screwdriver bit.

• Secured by a key in • Motor location

any old models 6. Drill bit

3. Trigger • Hole maker

• Rotation activation

Figure 1. Parts of Cordless Drill

6
 How to repair Cordless drill

Figure #1 back of the drill

internal and external

Taking apart:
1. Remove the 3 back screw and take it off back cover
2. Remove the trigger but pushing the unlock button
3. Remove the internal screw
4. Remove the front of the drill
5. Carefully remove the armature and any cover that may be in front

Figure #2 A clean armature,

with an arrow pointing to the
copper conductor

To Clean it:
1. Take apart of the drill
2. Remove the armature
3. Sand the copper so it shiny and smooth
4. Clean, remove any copper filings
5. Clean the rest of the drill the best you can do
To put together:
• Place parts back in the same order they were removed

Portable Grinder is a handheld power tool used for grinding and polishing. It
can be powered by electric motor or compressed air

7
 How to fix/troubleshoot your Portable Grinder

My angle grinder won't turn on

Flipping the switch with the grinder plugged in doesn't get any response:
1. Loose power connectors
• One possible reason for a lack of power is loose power
connectors. These are on the inside of the device at end
closest to the power cable.
2. Broken wire holders
• There are very delicate plastic pieces that hold the wires
making an electrical connection to the rotational component
of the grinder.
My switch is broken
The switch to the grinder is either broken, loose, or inoperable:
1. Broken locking mechanism
• Like all moving parts, sometimes switches can break or lose
their function.
2. Broken Plastic extender
• The switch in the portable grinder is composed of the
electronic switch in the main body of the grinder that is
manipulated by an extending plastic piece connected to the
exterior switch.
My grinder is turning slowly
The grinder doesn't spin as fast as it used to:
1. Loose spindle nut
• Inside the gearing of the grinder is a nut keeping the gears
in place. If this nut becomes loose, you may experience
slow revolutions or rattling of the grinder.
2. Excess debris
• Sometimes there are obstructions inside the grinder from
use that cause a slowing of the device. It is important to
keep the moving parts of your grinder clean and lubricated
for proper operation.
My portable grinder is giving off smoke
Smoke is coming off or out of my grinder
1. Rust Debris
• Smoke can be generated specifically when there's too much
debris around the main wheel.
2. Improper disk
• If there is smoke coming off of the disk portion of the
grinder, it's possible that you're using the wrong size or type
of wheel.

8
 Hammer Drill is a power tool used chiefly for drilling in hard materials.
It is a type of rotary drill with an impact mechanism that generates
a hammering motion.

When using a hammer drill to drill through hard substances such as

concrete or tile, there are several problems that can collect up that can cause
your work to slow down or even stop. Below are a few common problems
that can occur while using a hammer drill, also known as a rotary hammer,
while drilling through various substances.

How to fix/troubleshoot your hammer drill

1. Drill Bit Stops Drilling

The next biggest problem that you may face when drilling through
concrete or tile is where the drill bit stops drilling into the material. This
is caused by two things occurring. The solutions for these problems are
below:
• Material buildup: This problem can be cured by slowly moving
the bit up and down in the hole every 30 seconds or so while
drilling. Another trick is to keep a small length of tubing or a
straw handy and cautiously blowing the dust out of the hole.
• Bit jamming: When your drill bit contacts a piece of rock it can’t
break, you need to help it. Insert a pointed rock punch or
concrete nail in the hole and strike it sharply with a hammer a
couple of times to break the rock. If your first attempt isn’t
successful at breaking the rock, use more force with the
hammer.

9
2. Spawling
Is where chips of the material being drilled break and fly off the
material while it is being worked. This can be dangerous because
these pieces are often quite sharp and can cause bodily injury
• To minimize spawling, you first need to reduce the amount of
pressure that you’re using on the drill. Rotary hammer
manufacturers provide a rubber cup that fits over the end of the
chuck and lessen the amount of material that can break off and
fly away. This rubber cup is called a spawl shield.
3. Bit Jams
When a drill bit comes into glancing contact with a material it is
unable to cut, it may bind up in the hole and you may not be able to
remove it.
• When this happens, unplug the rotary hammer and remove the
bit from the drill. Using a special type of wrench called a Stillson
wrench, turn the drill bit counterclockwise to remove it from the
hole. Once the bit is removed, the blockage should be cleared
with a pointed masonry punch or a concrete nail.

Portable Power Threader

Power on/off
Threader Head
Motor

Forward Handle Power Cord

Grip

Handle

Die

Conduit Chuck

ACTIVITY SHEET

10
The following are some of the more general machine problems encountered
by users in the pursuit of good threads.

1. ELECTRICAL
Most electrical problems encountered in the field have to do with the loss
of threading power. Machines are susceptible to power losses when an
extension cord is used.
2. DIRT AND GRIT
This also causes smooth working surfaces to bind up, resulting in poor
threads and early machine failure. Much of the dirt and grit comes from
the environment in which the machines are used.
3. WAYS
There are two types of ways, round and flat. The round ways are used on
the smaller portable machines and the flat ways are used on larger
machines. The problems that arise in the round ways are from dirt, grit
and misuse. An occasional drop of lubricating oil (NOT CUTTING OIL)
will do a world of good.
4. DIE HEADS
The dies are usually inserted in the die head by aligning the "change
dies" marks. NEVER force the dies either in or out. Stop and find out why
they do not slide easily. It is better to disassemble a die head than to
hammer a set of dies out of it.
5. CARRIAGE / SADDLE
There are two types of carriages. One carries the die head and one
carries the material in a vise. In operation these are similar to each other,
and consequently fall prey to the same problems. The majority of carriage
problems are from wear, causing alignment difficulties.
6. ALLIGNMENT
If the machine components are misaligned, poor threads will result. An
easy test to check alignment is to, (with the machine off), place the
material in the chuck, close to the die head, then bring the two together.
The material should touch all the throats of the die segments at the same
time. If it does not, the machine is out of alignment.
7. LEVELING
It is important that the threading machine is kept as level as possible.
Large machines should be mounted per the manufacturer's instructions.
Portable machines are often used outside on construction sites. Care
should be used to keep them on as level and stable a surface as
possible.
8. TRANSMISSION
Transmissions are found on the mid-sized to larger threading machines.
As with any other machine tools periodic care should be taken to
maintain the proper level of lubrication oil in the cases. Your owner's
manual should list the type of oil and frequency of replacement.
9. CHUCKING OF MATERIAL
If trouble is encountered gripping the material with these types of chucks,
check the replaceable jaw inserts to see if they are cracked, broken, or
worn. On machines with rotating die heads the chucks do not turn.
Problems incurred with gripping in these devices are usually due to worn
jaws.
11
 ACTIVITY#1

REPLACE AUXILIARY PART OF ELECTRICAL POWER TOOLS

CORDLESS DRILL

Name _________________ Date________________ Grade/Sec: ____________

The student will perform the following while doing troubleshooting

procedure in fixing cordless drill:
Putting together/cleaning
Yes No
1. Remove the 3 back screw and take it off back cover

2. Remove the trigger and pushing back the unlock button

3. Remove the internal screw
4. Remove the front of the drill
5. Carefully remove the armature and any cover that may be in
front
6. Take a part of the drill (refer to figure # 2 of cordless drill)
7. Remove the armature
8. Sand the copper so it will be shinny and smooth
9. Clean and remove any copper fillings
10. Clean the rest of the drill the best that you can do

Comments: _________________________________________________________
_________________________________________________________

Observation: ________________________________________________________
________________________________________________________

12
ACTIVITY # 2: What are the common issues/problems that you will encounter
in fixing Portable grinder, also state the solutions in fixing your portable grinder?

Hydraulic Tools are a common term that includes low to high-pressure tooling
and equipment. Tools include but are not limited to jacks, cylinders, crimpers,
spreaders, cutters, splitters, breakers, drivers, torque wrenches, punches, drills,
saws, and more.

Hydraulic Pipe Bender are instruments that use hydraulic pressure to bend
several sizes of metal pipe and electrical conduit to exact angles.

13
Maintenance Instruction:
Maintain the hydraulic bender according to these procedures for a longer product
life and to reduce the risk of injury from electrical shock and other causes

1. Cleaning
• After each use, wipe any oil or dirt off the bender and formers
with a clean, dry soft cloth. Pay special attention to the ram
and piston to remove any dirt or debris that could scratch
polished parts or damage seals. If needed, the formers and
corner supports can be cleaned with a wire brush
2. Lubrication
• Monthly or more often if needed, apply a light machines oil or
grease to handle pivot points, wing hinge, and pins. Do not
apply oil to hydraulic system components

3. Checking Level/Adding Hydraulic Oil

• Before each use, check oil level. Place the bender on a flat
level surface with the ram fully retracted. Remove the oil vent
cap – oil should be even with the bottom of the fill neck. If oil is
needed, add shell Tellus 32 Hydraulic Oil or other equivalent
high-quality hydraulic oil and replace oil vent cap.

14
ACTIVITY:3 10 points
Essay: Write a paragraph at least 3-5 sentences on how to maintain electrical
/ hydraulic tools.

REMEMBER

Troubleshooting often applied to repair failed products or processes on a

machine or a system. It is a logical, systematic search for the source of a
problem in order to solve it and make the product or process operational
again. Troubleshooting is needed to identify the symptoms

Maintenance involves functional checks, servicing, repairing or replacing of

necessary devices, equipment, machinery, building infrastructure, and
supporting utilities in industrial business, governmental, and residential
installation.

15
CHECK YOUR UNDERSTANDING
Direction: Read and understand each statement carefully, write “ T ” if the
statement is true and “ F “ if False. Write your answer on the space provided
before the number.

_______________1. One possible reason for a lack of power is loose power

connectors.

_______________2. Troubleshooting involves functional checks, servicing, repairing

or replacing of necessary devices, equipment, machinery,
building infrastructure, and supporting utilities in industrial
business, governmental, and residential installation.

_______________3. Portable Power Threader is a tool used for drilling holes in

different materials or for connecting different materials
together.

_______________4. Hydraulic Pipe Bender are instruments that use hydraulic

pressure to bend several sizes of metal pipe and
electrical conduit to exact angles.

_______________5. To minimize spawling, you first need to reduce the amount of

pressure that you’re using on the drill.

POST - TEST
Directions: Read each question and answer choice carefully and choose the
best answer. Write your answer on the space provided.

1. Is where chips of the material being drilled break and fly off the material
while it is being worked?
a. Cleaning c. Lubrication
b. Chuck d. Spawling
2. Do not use a heat gun near ________________ materials/atmospheres.
a. Cement c. Metal
b. Flammable d. Solid
3. In adding hydraulic oil of hydraulic pipe bender. What type of hydraulic
oil should be used?
a. Baking oil c. Low quality oil
b. Crane oil d. Tellus 32 oil
4. a tool used for drilling holes in different materials or for connecting
different materials together Is?
a. Heat gun c. Portable Grinder
b. Portable Power Drill d. Portable Threader
5. What personal protective equipment should be worn when operating
portable disc grinder?
a. Safety Glasses
b. Safety Glasses and hearing protection
c. Safety glasses, hearing protection and gloves
d. Safety glasses, hearing protection, gloves and respirator
16
6. What can the operator do to avoid hand and finger fatigue when using
the disc grinder for extended periods of time?
a. Drink plenty of water
b. Eat lots of carbohydrates
c. Use the switch lock
d. Wear Long sleeve gloves
7. What are the possible solution if the drill bit stop drilling?
a. Bit jamming c. Material buildup and bit jamming
b. Lubrication d. Material maintenance
8. Hands and arms should be protected by wearing ________when using
portable disc grinder.
a. Gloves
b. Long sleeved shirt
c. Long sleeved leather jacket
d. Long sleeved leather gloves
9. What type of drill speed is needed for most drilling operations?
a. High c. Medium-high
b. Low d. Medium-low
10. To prevent seizing when drilling, the operator should_________.
a. Lubricate the drill bit
b. Reduce the rpm’s of the portable electric drill
c. Reduce the feed pressure when the bit is about to finish drilling.
d. Used the high speed drill bit
11. This is the most common problem of electrical power tools and hydraulic
tools.
a. Dirt c. Lubrication
b. Grit d. Source/ electrical power
12. The purpose of moving the drill and the bit up and down often while
drilling deep hole is to ______________.
a. Give the drill operator better drilling leverage.
b. Help keep the hole centered
c. Reduce overheating in the drill bit.
d. Ream the hole slightly larger
13. The purpose of turning the drill on before attempting to drill a hole is to
____.
a. Check if the power cord is good
b. Make sure the chuck key has been removed
c. See if the drill bit is running true
d. See if the drill operates
14. The purpose of a pilot hole when drilling is to _______.
a. Allow the final hole to be drilled at a faster revolution per minute(rpm)
and to finish smoothly
b. Guide the final drilling operation and achieved a more accurately
place hole.
c. Make the final hole drilling operation
d. Reduce the feed pressure needed to drill a hole.
15. __________ is used to drive the pressurized oil.
a. Hydraulic hose c. Hydraulic pump
b. Hydraulic oil d. Hydraulic rum
ANSWER KEY
17
 LOOKING BACK TO LESSON CHECKING YOUR UNDERSTANDING
1. Crude Oil 1. T
2. Grease 2. F
3. Solid Lubricants 3. F
4. Rust remover 4. T
5. Dry lubricants 5. T
6. Penetrating Lubricants

PRE - TEST POST - TEST

1. B 1. D
2. C 2. B
3. C 3. D
4. D 4. B
5. A 5. D
6. D 6. C
7. B 7. C
8. C 8. B
9. D 9. C
10. B 10. C
11.D 11.D
12.B 12.A
13.D 13.D
14.C 14.B
15.C 15.C

Note:
• Post-test passing score: 10 and above, failed score: 9 and below.
• If you got failed score on post-test, please review again the module.
• If your score on the post-test is greater than your pre-test score and got a
passing score, then congratulation! You can now proceed to the next module.

REFLECTIVE LEARNING SHEET

18
 I learned that…
___________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________
________________________________________________________

REFERENCES

Books:
Competency-Based Learning Module, 2nd Year Building Wiring
Installation NCII by DepEd

Online Resources:
Waste Petroleum Oils - Buy Waste Motor Oil Product on Alibaba.com
https://en.wikipedia.org/wiki/Grease_(lubricant)
molybdenum-disulfide-the-king-of-solid-lubricants-i00068i1
https://www.wd40.com/products/dry-lube/
https://en.wikipedia.org/wiki/Dry_lubricant
https://en.wikipedia.org/wiki/Penetrating_oil
Mulin, R.C., Smith R.L. Electrical Wiring-Commercial, Six Ed., New York:
Delmar’s Publishing Inc.; 1984, pp.
https://www.grainger.com/category/tools/power-tools/power-
benders/hydraulic-pipe-benders
https://www.ifixit.com/Wiki/DeWalt_D28110_Troubleshooting
https://www.doityourself.com/stry/troubleshooting-common-hammer-drill-
problems
https://www.testequipmentdepot.com/ridgid/pdf/36518-36523_manual.pdf
https://en.wikipedia.org/wiki/Maintenance_(technical)
https://en.wikipedia.org/wiki/Troubleshooting

19
 Acknowledgement
First Edition 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in
any work of the Government of the Philippines. However, prior approval of the
government agency or office wherein the work is created shall be necessary
for exploitation of such work for profit. Such agency or office may, among
other things, impose as a condition the payment of royalties.

Borrowed materials (i.e. songs, stories, poems, pictures, photos, brand

names, trademarks, etc.) included in this module are owned by their
respective copyright holders. Every effort has been exerted to locate and seek
permission to use these materials from their respective copyright owners. The
publisher and authors do not represent nor claim ownership over them.

Published by the Department of Education

Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio

Development Team of the Module

Writer: Joshua G. Delos Santos
Teacher, E. Rodriguez Vocational High School

Editor: Ariel D. Tosio, Ed. D – IEM,

Education Program Supervisor – TLE-TE/Voc

Reviewer/Validator: Albee M. Dominguez, MTE

Master Teacher, Victorino High School

Richard M. Fatalla
Head Teacher, Claro Recto High School

Feliciano B. Taguibao
Head Teacher, Timoteo Paez Integrated School

Management Team: Malcolm S. Garma, Regional Director

Genia V. Santos, CLMD Chief
Dennis M. Mendoza, Regional EPS in Charge of LRMS and
Regional ADM Coordinator
Maria Magdalena M. Lim, CESO V
Schools Division Superintendent
Aida H. Rondilla, Chief-CID
Lucky S. Carpio, Division EPS in Charge of LRMS and Division ADM
Coordinator

20