King Air 90 Series Maintenance Manual (Rev D0)

12-20-11 (Rev D0)

LUBRICATION SCHEDULE - SERVICING

1. Information
A. Refer to Standard Practices - Airframe Chapter 20-14-00, 201, for information on tools and equipment referenced in Table 301.
Refer to Standard Practices - Airframe Chapter 20-15-00, 201, for information on recommended materials referenced in Table
301.
Table 301. Tools/Equipment and Recommended Materials
ITEM TOOLS AND EQUIPMENT ITEM RECOMMENDED
MATERIALS
099 Grease gun 03-013 Grease
02-034 Oil
02-001 Corrosion Preventative
Compound
02-006 Corrosion Preventative
Compound
02-002 Lubricating Oil
02-014 Corrosion Inhibitor
02-015 Lubricating Oil
02-016 Lubricating Oil
02-017 Dry Powder Lubricant
02-018 Lubricating Paste
02-019 Lubricating Oil
02-020 Chain Lubricant
02-026 Lubricant
03-001 Grease
03-002 Grease
03-003 Lubricating Grease
03-004 Grease
03-005 Lubricating Grease
03-007 Grease
03-008 Grease
06-004 Naphtha
06-005 Dry Cleaning Solvent
09-041 Anti-Seize Tape
2. Lubrication Schedule
A. Prior to performing the various lubrication tasks in each area, it is important that proper safety precautions and access to the
specified areas be accomplished.
B. Use only clean and approved lubricants. Remove all excess oil and grease that accumulates near the lubrication fittings and
areas. Refer to the Lubrication Schedules, for proper lubricants and the hourly intervals for lubrication.
C. The following lubrication schedule is organized so that related items requiring lubrication are grouped together. Each lubrication
point is identified and indexed for location on the accompanying illustration. Lubrication time intervals are incremented to occur
at times coincident with the inspection intervals in Chapter 05.
D. Lubrication Precautions
CAUTION: Do not mix different grease. If the grease is changed, make certain that all the affected components are
thoroughly cleaned before relubrication. When changing over from one type or brand name grease to

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 King Air 90 Series Maintenance Manual (Rev D0)
12-20-11 (Rev D0)

another, the recommended practice is to remove all of the old grease from the bearing surfaces and
internal cavities of the lubricated mechanism prior to application of the new grease.
CAUTION: Textron Aviation does not recommend intermixing different types or brand names of grease, even if
they are considered optional to each other, because of possible incompatibility. Different grease
approved to the same specification may be incompatible with each other.
CAUTION: Mixing of grease made with different thickener types should be avoided; thus clay thickened grease
should not be mixed with metallic soap thickened grease as this can lead to breakdown of the thickener
structure.
(1) Cleanliness is essential to good lubrication. Lubricants and dispensing equipment must be kept clean. Use only one
lubricant in a grease gun or oil can.
(2) The lubricant used for relubrication and the lubricant used in the assembly or installation of parts should be of the same
type.
(3) Store lubricants in protected containers kept closed at all times when not in use.
(4) Wipe grease fittings and areas to be lubricated with clean dry cloths before lubricating.
(5) All lubricant containers should have a label showing contents and shelf life.
(6) To lubricate threads, apply a small quantity of the specified lubricant on external threads only.
(7) To apply lubricant on press-type fittings, lubricate only to the extent that the lubricant comes out slightly around the bushing
and bearing.
(8) After any lubrication, clean excess lubricant from all but actual working parts.
(9) All sealed or prepacked antifriction bearings are lubricated by the manufacturer with grease (03-001, Table 301) unless
otherwise specified.
(10) Do not oil antifriction bearings or expose them to spray from steam or chemical cleaners. When exterior bearing surfaces
are cleaned, wipe with a cloth dampened with dry cleaning solvent (06-005, Table 301).
(11) Friction bearings of the porous, sintered type are prelubricated. An occasional oiling of such bearings by a squirt can of
Lubricating oil (02-002, Table 301) will extend their service life.
(12) Use Lubricating oil (02-002, Table 301) to lubricate unsealed pulley bearings, rod ends, pivot ends, hinge points and any
other friction points obviously needing lubrication.
E. Landing Gear Retract System Lubrication
INDEX NO. (Ref. Figure 301) ITEM LUBRICANT INTERVAL
1. Retract Chains (Mechanical Lubricate sparingly with 30W 800
Gear) Mineral Oil (02-020, Table
301). Wipe off excess oil.
2. Emergency Extension MIL-PRF-7870 (Supersedes 200
Mechanism (Mechanical Gear) MIL-L-7870) Oil (02-002,
Table 301)
3. Limit Switch Screw and Nut Mix 45 grams of Molykote Z 200
(Mechanical Gear) (02-017, Table 301) per
pound of MIL-PRF-23827
Grease (03-001, Table 301)
(Supersedes MIL-G-23827).
Wipe off any excess.
4. Shaft Bearings (Mechanical MIL-PRF-81322 (Supersedes 200
Gear) MIL-G-81322) Grease (03-
002, Table 301)
5. Landing Gear Clutch Fingers MIL-PRF-32033 (Supersedes 800
(Mechanical Gear) VV-L-800) Oil (02-015, Table
301)

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 King Air 90 Series Maintenance Manual (Rev D0)
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6. Retract Chain Idler Sprocket MIL-PRF-23827 Grease (03- 1000 cycles or 30 months,
Needle Bearings (Mechanical 001, Table 301) whichever comes first
Gear)

7. Emergency Extension MIL-PRF-7870 Oil (02-002, 200 Hours

Mechanism (Hydraulic Gear) Table 301)
8. Nose Gear Actuator Universal MIL-PRF-81322 Grease (03- 200 Hours
Block 002, Table 301)
9. Main and Nose Gear Actuator MIL-PRF-23827 Grease (03- 1000 cycles or 30 months,
Support Bearings * 001, Table 301) whichever occurs first
10. Main and Nose Gear Actuator Aeroshell 64 Grease 1000 cycles or 30 months,
(Mechanical) **(Ref. Chapter (Preferred) or Aeroshell whichever occurs first
32) Grease No. 17. (03-003,
Table 301)
* Not required if sealed bearings are installed.
** DO NOT MIX greases of different types. Aeroshell 17 Grease is not compatible with Aeroshell 64 Grease even though
qualified to the same MIL-G-21164 specification. Overhaul of the actuator is recommended if the grease is to be changed as
the actuator will need to be completely disassembled and all components thoroughly cleaned first.
F. Nose Landing Gear Lubrication
INDEX NO. (Ref. Figure 302) ITEM LUBRICANT INTERVAL
1. Door Hinges and Retract MIL-PRF-7870 (Supersedes 200 Hours
Linkage MIL-L-7870) Oil (02-002,
Table 301)
2. Grease Fittings Aeroshell 64 Grease 200 Hours
(Preferred) or Aeroshell
Grease No. 17. (03-003,
Table 301)
3. Wheel Bearings Mobil Aviation Grease SHC 200 Hours
100 * (03-007, Table 301)
4. Nose Wheel Steering Aeroshell 64 Grease 200 Hours
Mechanism (Preferred) or Aeroshell
Grease No. 17.(03-003, Table
301)
5. Hinge Bolts and Bushings ** LPS No. 3 Metal Protector 200 Hours
(02-014, Table 301)
6. Grease Fittings *** Aeroshell 64 Grease 200 Hours
(Preferred) or Aeroshell
Grease No. 17. (03-003,
Table 301)
7. Drag Leg Bolts and Bushings LPS No. 3 Metal Protector 200 Hours
** (02-014, Table 301)
8. Grease Fittings *** Aeroshell 64 Grease 200 Hours
(Preferred) or Aeroshell
Grease No. 17. (03-003,
Table 301)

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 King Air 90 Series Maintenance Manual (Rev D0)
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9. Drag Leg Stop Bolt Grease Aeroshell 64 Grease 200 Hours

Fitting *** (Preferred) or Aeroshell
Grease No. 17. (03-003,
Table 301)

10. Top Brace Upper and Lower Aeroshell 64 Grease 200 Hours
Bearings * (Preferred) or Aeroshell
Grease No. 17 (Molybdenum
Disulfide Grease Only) (03-
003, Table 301)
* DO NOT MIX different brands of grease, as this can cause decreased bearing life. Before lubrication of wheel bearings, if
the grease is to be changed make certain that all the affected components are thoroughly cleaned first
** Prior to LJ-577 and LW-51 that have not incorporated Beech Service Instructions 0516-200
*** LJ-577 and After, LW-51 and After and earlier serials that have incorporated Beech Service Instructions 0516-200
NOTE:
When lubricating the lower or upper strut bushing, jack the nose wheel up and shake and rotate the wheel side to
side to make sure that the lubricant penetrates to the contacting surfaces of the bushing.
G. Main Landing Gear Lubrication
INDEX NO. (Ref. Figure 303) ITEM LUBRICANT INTERVAL
1. Grease Fittings Aeroshell 64 Grease 200 Hours
(Preferred) or Aeroshell
Grease No. 17. (03-003,
Table 301)
2. Wheel Bearings (4) * Mobil Aviation Grease SHC- 200 Hours
100 (03-007, Table 301)
3. Retract Grease Fittings (10) Aeroshell 64 Grease 200 Hours
(Preferred) or Aeroshell
Grease No. 17. (03-007,
Table 301)
4. Door Hinges and Retract MIL-PRF-7870 (Supersedes 200 Hours
Linkage (12) MIL-L-7870) Oil (02-002,
Table 301)
5. Yoke Assembly, Drag Brace MIL-PRF-7870 Oil (02-002, 200 Hours
(2) Table 301)
6. Upper Shock absorber and ACF-50 spray lube or similar Annually
top brace casting joint. Note: (02-006, Table 301)
Disassembly not required.
* DO NOT MIX different brands of grease, as this can cause decreased bearing life. Before lubrication of wheel bearings, if
the grease is to be changed make certain that all the affected components are thoroughly cleaned first.
H. Engine Lubrication
INDEX NO. (Ref. Figure 304) ITEM LUBRICANT INTERVAL
1. Control Rod Ends MIL-PRF-23827 (Supersedes 200 Hours
MIL-G-23827) Grease (03-
001, Table 301)

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 King Air 90 Series Maintenance Manual (Rev D0)
12-20-11 (Rev D0)

2. Starter/Generator Drive Shaft Molykote M77 (02-018, Table 400 Hours or Any Time the
Spline on LJ-1 thru LJ-1110 301) or Plastilube No. 3 (03- Generator is Removed.
and LW-1 and After. 009, Table 301) (Some, upon inspection may
(Airplanes LJ-1111 and After require more frequent spline
have wet spline drive shafts lube intervals).
which are lubricated by the
engine oil system and do not
require periodic lubrication).
3. Cam Plates and Pins Lubriplate No. 130AA (03- 200 Hours
005, Table 301)
I. Engine Controls, Trim Tab Controls and Propeller Lubrication
INDEX NO. (Ref. Figure 305) ITEM LUBRICANT INTERVAL
ENGINE CONTROLS
1. Linkage (All moving parts) MIL-G-21164 Grease As required for proper
Aeroshell 64 Grease operation
Preferred (03-003, Table 301)
2. Throttle Switch Actuator Door Ease (02-026, Table As required for proper
301) operation
3. Prop Detent Spring Door Ease (02-026, Table As required for proper
301) operation
TRIM TAB CONTROLS
4. Tab Control Linkage (All MIL-PRF-7870 (Supersedes As required
moving parts) MIL-L-7870) Oil (02-002,
Table 301)
PROPELLER
5. Propeller Hub (Hartzell) Aeroshell Grease No. 5, (03- 400 Hours or 12 calendar
013, Table 301)Aeroshell months, whichever occurs first
Grease No. 6, (03-008, Table NOTE:
301)Aeroshell Grease No. 7, If annual operation is
(03-001, Table 301)Aeroshell significantly less than 400
Grease No. 22, (03-002, hours, calendar lubrication
Table 301)Royco 22C (03- intervals should be
002, Table 301) reduced to six months. If
NOTE: the airplane is operated or
See Hartzell Service stored under adverse
Bulletin 159 (Beech Service atmospheric conditions, e.g
Bulletin No. 2266) for , high humidity, salt air,
limitation of use of calendar lubrication
Aeroshell Grease No. 5 at intervals should be
temperatures below -40°F. reduced to six months
When lubricating Hartzell
hubs, remove one grease
fitting in each hub (this lets
excess pressure vent
before the seals rupture)
Before pumping grease
into the other grease fitting.
Install the grease fitting.

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 King Air 90 Series Maintenance Manual (Rev D0)
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Propeller Hub (McCauley) NOTE:

No lubrication is required
for McCauley propeller
hubs.

6. Low Pitch Stop Rods Marvel Mystery Oil (02-019, 200 Hours
(Reversing Propeller) Table 301)
NOTE: NOTE:
No lubrication is required As required by propeller
for Hartzell propeller low manufacturer.
pitch stop rods.
J. Control Column, Rudder Pedals and Bellcranks Lubrication
NOTE: When any turnbuckle is loosened, coat the interior of the turnbuckle with MIL-PRF-23827 (Supersedes
MIL-G-23827) grease.
INDEX NO. (Ref. Figure 306) ITEM LUBRICANT INTERVAL
CONTROL COLUMN
1. Linkage SAE 30 Oil (02-020, Table 400 Hours
301)
RUDDER PEDALS AND BELLCRANKS
2. Rudder Pedal and Bellcrank MIL-PRF-7870 (Supersedes 400 Hours
Linkage MIL-L-7870) Oil (02-002,
Table 301)
K. Rudder Elevator and Aileron Lubrication
INDEX NO. ITEM LUBRICANT INTERVAL
(Ref. Figure
307)
1. Rudder Trim Tab MIL-PRF-32033 Oil (e.g. Brayco 300) preferred; 200 Hours
CRC 3-36, LPS-1 or WD-40 are acceptable
alternatives (02-015, Table 301)
2. Rudder Trim Tab Actuator MIL-PRF-23827 (Supersedes MIL-G-23827) Grease 5 years or 1200 Hours
(03-001, Table 301) whichever occurs first
3. Rudder Trim Tab Hinge MIL-PRF-32033 (Supersedes VV-L-800) Oil (e.g. 200 Hours
Brayco 300) preferred; CRC 3-36, LPS-1 or WD-40
are acceptable alternatives (02-015, Table 301)
4. Elevator Trim Tab Actuator (2) MIL-PRF-23827 Grease (03-001, Table 301) 400 Hours
5. Elevator Trim Tab Control MIL-PRF-32033 Oil (e.g. Brayco 300) preferred; 400 Hours
Tubes (4) CRC 3-36, LPS-1 or WD-40 are acceptable
alternatives (02-015, Table 301)
6. Elevator Trim Tab Hinges (2) MIL-PRF-32033 Oil (e.g. Brayco 300) preferred; 200 Hours
CRC 3-36, LPS-1 or WD-40 are acceptable
alternatives (02-015, Table 301)
7. Elevator Hinge Bearings MIL-PRF-81322 (Supersedes MIL-G-81322) Grease 800 Hours
(Mobil G-28 preferred) (03-002, Table 301)
8. Aileron Trim Tab Hinge MIL-PRF-32033 Oil (e.g. Brayco 300) preferred; 200 Hours
CRC 3-36, LPS-1 or WD-40 are acceptable
alternatives (02-015, Table 301)
9. Aileron Trim Tab Actuator (1) MIL-PRF-23827 Grease (03-001, Table 301) 400 Hours

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 King Air 90 Series Maintenance Manual (Rev D0)
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10. Aileron Trim Tab Push Rod MIL-PRF-32033 Oil (e.g. Brayco 300) preferred; 200 Hours
Ends CRC 3-36, LPS-1 or WD-40 are acceptable
alternatives (02-015, Table 301)
11. Trim Tab Cable Seals MIL-PRF-23827 Grease (03-001, Table 301) 800 Hours
12. Control Cable Seals MIL-PRF-23827 Grease (03-001, Table 301) 800 Hours
NOTE:
When any turnbuckle is loosened, coat the interior of the turnbuckle with MIL-PRF-23827 (Supersedes MIL-G-
23827) Grease (03-001, Table 301).
L. Aileron and Flap Control Systems and Wing Bolts Lubrication
INDEX NO. (Ref. Figure 308) ITEM LUBRICANT INTERVAL
AILERON CONTROL SYSTEM
1. Aileron Quadrant MIL-PRF-7870 (Supersedes 400 Hours
MIL-L-7870) Oil (02-002,
Table 301)
2. Aileron Bellcranks MIL-PRF-7870 Oil (02-002, 400 Hours
Table 301)
3. Aileron Push Rod Ends MIL-PRF-7870 Oil (02-002, 400 Hours
Table 301)
FLAP CONTROL SYSTEM
4. Flap Actuator Piston SAE-J2360 (Supersedes MIL- 1200 Hours
(Ref. 27-50-09, 301) L-2105 and MIL-L-10324) Oil
(02-016, Table 301)
5. Flap Tracks Dry Powder Lubricant (02- 200 Hours
017, Table 301)
6. Flap Actuator Drive Shafts MIL-PRF-23827 (Supersedes 1200 Hours
with keyway style ends on MIL-G-23827) Grease (03-
Airplanes LJ-1 thru LJ-526 001, Table 301)
without Beech Kit No. 99-4017
7. Flap Motor Gearbox MIL-PRF-10924 (Supersedes 1200 Hours
MIL-G-10924) Grease (03-
004, Table 301)
WING BOLTS
8. Barrel Nuts (Lower, LJ-1 thru MIL-PRF-16173 (Supersedes At the first scheduled
LJ-1087 except LJ-1085, and MIL-C-16173), Grade 2 inspection. Anytime the wing
LW-1 and After with Beech Kit Corrosion Preventive bolt has been loosened or
No. 90-4077-1; Upper on LJ- Compound (02-001, Table retorqued. Annually thereafter.
1085 and LJ-1088 and After) 301) (See Note)
NOTE:
An Alemite P/N 314150 grease nozzle is necessary to lube the barrel nut assemblies. Inject the compound until the
compound emerges from between the two portions of the barrel nut, emerges from the threaded portion of the bolt
or the lubrication fitting refuses to accept additional compound. Coat all exposed portions of the threads of the
bolt with additional compound.
Use of a lever action grease gun (099, Table 301) will aid in lubricating the wing bolts.
M. Doors and Strobe Lights Lubrication
INDEX NO. (Ref. Figure 309) ITEM LUBRICANT INTERVAL
DOORS

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 King Air 90 Series Maintenance Manual (Rev D0)
12-20-11 (Rev D0)

1. Emergency Exit Door Mix Molykote Z (02-017, Table 800 Hours

Mechanism 301) with Naphtha (06-004,
Table 301) into a paste &
apply with brush
2. Cabin Door Latching MIL-PRF-7870 (Supersedes 400 Hours
Mechanism MIL-L-7870) Oil (02-002,
Table 301)
3. Hinge MIL-PRF-32033 (Supersedes 200 Hours
VV-L-800) Oil preferred; CRC
3-36, LPS-1 or WD-40
alternate (02-015, Table 301)
STROBE LIGHTS
4. Timer Motor (Cams and Aeroshell No. 12 Oil(02-034, 800 Hours
Bearings) Table 301)

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