18M Series 3Motor Grader TA2 Technical Inspection

Motor Grader

18M Series 3 (S/N: E9W1-UP)

Electrical System

Description Specification
Inspect Battery Cables Cables between the battery, the starter, and the engine
ground must be the correct size. Wires and cables must be
free of corrosion. Wires and cables must have cable
support clamps to prevent stress on battery connections
(terminals).
Battery Test 12.4 VDC or more

Engine

Cooling System

Description Specification
Belt Tension Auto-Tension

Fuel System

Description Specification
Fuel Pressure at 1800 RPM 586 kPa (85 psi)
Fuel Pressure at 600 RPM 690 to 724 kPa (100 to 105 psi)

Lubrication System

Description Specification
Engine Oil Pressure at LOW IDLE (600 to 800 68 kPa (10 psi)
RPM)
Engine Oil Pressure at 1800 RPM 275 to 414 kPa (40 to 60 psi)

Basic Engine

Description Specification
Engine Speed at Low Idle 800 rpm
Engine Speed at High Idle 2150 rpm

Cat 18M
Last Updated: 27/07/2020 Page 1 of 5 Technical Analysis Inspection Level 2 Form
Performance Checks

Cylinder Cycle Time - Check

Description Specification
Blade Lift - Rod In(2) 3.0 ± 1.0
Blade Lift - Rod Out(2) 4.0 ± 1.0
Centershift - Rod In(3) 5.5 ± 2.0
Centershift - Rod Out(3) 6.5 ± 2.0
Wheel Lean - Rod In(3) 2.5 ± 1.0
Wheel Lean - Rod Out(3) 2.5 ± 1.0
Blade Tip - Rod In(3) 6.0 ± 2.0
Blade Tip - Rod Out(3) 5.5 ± 1.5
Side Shift - Rod In(3) 16.0 ± 4.0
Side Shift - Rod Out(3) 16.0 ± 4.0
Ripper (If Equipped) - Rod In(2) 3.5 ± 1.0
Ripper (If Equipped) - Rod Out(2) 4.0 ± 1.5
Articulation - Left (3)(4) 6.0 ± 1.5
Articulation - Right (3)(4) 6.0 ± 1.5
Blade Circle - 1/4 rotation 13.0 ± 4.0
(2) Cycle times are for a "running distance" of 305 mm (12 inch).
(3) Cycle time is through full travel.
(4) When checking cycle times of these cylinders, operate the machine at high idle and place
the transmission control (lever) in the FIRST SPEED position. The differential must be
unlocked.

Hydraulic Cylinder Drift - Check

Description Specification
Maximum allowable movement for Blade Lift in 9.0 mm (0.35 inch)
3 minutes at oil temperature of 38° to 50°C
(100 ° to 122°F)
Maximum allowable movement for Blade Tip in 4.0 mm (0.16 inch)
3 minutes at oil temperature of 38° to 50°C
(100 ° to 122°F)
Maximum allowable movement for Ripper in 3 3.0 mm (0.12 inch)
minutes at oil temperature of 38° to 50°C (100 °
to 122°F)
Maximum allowable movement for Wheel Lean 3.0 mm (0.12 inch)
in 3 minutes at oil temperature of 38° to 50°C
(100 ° to 122°F)

Hydraulic and Steering System

Pump Control Valve (Implement, Steering) - Test and Adjust

Description Specification
Margin Pressure Test 14.3 ± 1.9 seconds
Margin Pressure Adjustment 2100 ± 100 kPa (305 ± 15 psi)
Signal Pressure Adjustment 22050 ± 500 kPa (3200 ± 72 psi)

Cat 18M
Last Updated: 27/07/2020 Page 2 of 5 Technical Analysis Inspection Level 2 Form
 Steering Load Sense Pressure 20500 to 21000 kPa (2973 to 3046 psi)

Hydraulic System Pressure - Test and Adjust

Description Specification
Relief Valve Pressure Range 27600 ± 400 kPa (4000 ± 60 psi) at a flow of 4.0 L/min
(1.10 US gpm)

Pilot Pressure - Test and Adjust

Description Specification
Pump Discharge Pressure 10000 kPa (1450 psi)
Pilot Pressure 4000 ± 200 kPa (580 ± 30 psi)

Accumulator (Blade Cushion) - Test and Charge

Charging Pressure and Temperature Relationship for the 2758 kPa (400 psi) Accumulator
Temperature Pressure
-7°C (20°F) 2494 kPa (362 psi)
-1°C (30°F) 2550 kPa (370 psi)
4°C (40°F) 2597 kPa (377 psi)
10°C (50°F) 2653 kPa (385 psi)
16°C (60°F) 2709 kPa (393 psi)
21°C (70°F) 2756 kPa (400 psi)
27°C (80°F) 2812 kPa (408 psi)
32°C (90°F) 2859 kPa (415 psi)
38°C (100°F) 2915 kPa (423 psi)
43°C (110°F) 2962 kPa (430 psi)
49°C (120°F) 3018 kPa (438 psi)

Disc Pack Preload for Circle Drive – Adjust

Description Specification
Spring Deflection 2.54 ± 0.25 mm (0.100 ± 0.010 inch)
Minimum thickness to reuse clutch disk 2.44 mm (0.096 inch)
Minimum thickness for friction material 0.20 mm (0.008 inch)

Braking and Hydraulic Fan System

Piston Pump (Brake, Hydraulic Fan) High-Pressure Stall - Test and Adjust

Description Specification
High-Pressure Cut off Setting 21000 ± 350 kPa (3046 ± 51 psi)

Cat 18M
Last Updated: 27/07/2020 Page 3 of 5 Technical Analysis Inspection Level 2 Form
Piston Pump (Brake, Hydraulic Fan) Margin Pressure - Test and Adjust

Description Specification
Margin Pressure for Braking and Hydraulic Fan 1800 ± 100 kPa (261 ± 14.5 psi)
Pump

Hydraulic Fan Speed - Test

Description Specification
Minimum Fan Speed 550 ± 50 rpm
Maximum Fan Speed - Standard 1450 ± 50 rpm

Brake Accumulator Charging Valve - Test and Adjust

Description Specification
Cut IN, Pressure 11650 ± 350 kPa (1690 ± 51 psi)
Cut OUT, Pressure 17650 to 19950 kPa (2560 to 2893 psi)

Brake Accumulator (Service) - Test and Charge

Temperature Pressure(1)
-10°C (14°F) 4952 kPa (718 psi)
-5°C (23°F) 5046 kPa (732 psi)
0°C (32°F) 5140 kPa (745 psi)
5°C (41°F) 5234 kPa (759 psi)
10°C (50°F) 5328 kPa (773 psi)
15°C (59°F) 5422 kPa (786 psi)
20°C (68°F) 5516 kPa (800 psi)
25°C (77°F) 5610 kPa (814 psi)
30°C (86°F) 5704 kPa (827 psi)
35°C (95°F) 5798 kPa (841 psi)
40°C (104°F) 5892 kPa (855 psi)
45°C (113°F) 5896 kPa (868 psi)
50°C (122°F) 6080 kPa (882 psi)
(1) The tolerance on the nominal pressure is 206 kPa (30 psi).

Service Brake System Pressure - Test

Description Specification
Left and Right Service Brake Pressures 5909 ± 207 kPa (857 ± 30 psi)

Brake Control Valve (Service) - Check

Description Specification
Maximum amount that the service brake 138 kPa (20 psi)
pressure can drop after two minutes

Cat 18M
Last Updated: 27/07/2020 Page 4 of 5 Technical Analysis Inspection Level 2 Form
Power Train System

Power Train Charge System Pressure - Test and Adjust

Description Specification
Power Train Charge System Pressure at HIGH 2480 ± 35 kPa (360 ± 5 psi)
IDLE

Transmission Lubrication Oil Pressure - Test

Description Specification
Transmission Lubrication Oil Pressure at LOW 14 kPa (2 psi)
IDLE in NEUTRAL position
Transmission Lubrication Oil Pressure at HIGH 275 kPa (40 psi)
IDLE in NEUTRAL position
Transmission Lubrication Oil Pressure at LOW 6 kPa (1 psi)
IDLE in FIRST GEAR FORWARD position
Transmission Lubrication Oil Pressure at HIGH 135 kPa (20 psi)
IDLE in FIRST GEAR FORWARD position

Transmission Pressures - Test and Adjust

Description Specification
Transmission Clutch Pressure at Test Port 1 in 1925 ± 220 kPa (280 ± 32 psi)
FIRST GEAR FORWARD position
Transmission Clutch Pressure at Test Port 2 in 1925 ± 220 kPa (280 ± 32 psi)
SECOND GEAR FORWARD position
Transmission Clutch Pressure at Test Port 3 in 1925 ± 220 kPa (280 ± 32 psi)
FIRST GEAR REVERSE position
Transmission Clutch Pressure at Test Port 4 in 2480 ± 70 kPa (360 ± 10 psi)
SECOND GEAR FORWARD position
Transmission Clutch Pressure at Test Port 5 in 2480 ± 70 kPa (360 ± 10 psi)
NEUTRAL position
Transmission Clutch Pressure at Test Port 6 in 2480 ± 70 kPa (360 ± 10 psi)
FIRST GEAR FORWARD and FIRST GEAR
REVERSE position
Transmission Clutch Pressure at Test Port 7 in 2480 ± 70 kPa (360 ± 10 psi)
FIRST GEAR FORWARD, SECOND GEAR
FORWARD, and FIRST GEAR REVERSE position
Transmission Clutch Pressure at Test Port 8 in 2480 ± 70 kPa (360 ± 10 psi)
NEUTRAL position

Differential Lock Pressure - Check

Description Specification
Differential Lock Pressure 2480 ± 70 kPa (360 ± 10 psi)

Cat 18M
Last Updated: 27/07/2020 Page 5 of 5 Technical Analysis Inspection Level 2 Form