986K Wheel Loader TA2 Technical Inspection {0372, 0374, 1000, 7000, 753T, 7565} Caterpillar

Wheel Loader

986K (S/N: MH81-UP; NL81-UP; SWH1-UP)

Introduction

Inspections are the most basic form of condition monitoring. Inspections are easy to do and surprisingly effective at helping you spot equipment health issues. Proactive monitoring and analysis of equipment information will allow Dealers to intervene effectively before problems occur.

Note: Before adjusting product settings to comply with listed baseline TA2 values, consult SIS for the latest specification values.

Creating an Electronic Copy

Use the following procedure to create an editable electronic copy from SIS web.

1. Click format to print.

2. Save the document as an HTML format.

3. Open the document with Microsoft Word.

Electrical System

Table 1

Status(1)	Description	Specification	Actual	Comments
	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		Refer to Special Instruction, SEHS7633, "Battery Test Procedure".
	Charging System Test	28 ± 1 V		Refer to Special Instruction, REHS0354, "Charging System Troubleshooting".
	Electric Starting System Test			Refer to Testing and Adjusting, UENR3351, "Electric Starting System - Test".

(1)	N = Normal, M = Monitor, A = Action

Engine

Reference: Refer to Testing & Adjusting, UENR3351 and SENR9832, "C15 and C18 Tier 4 Final Engines" for more detail on the following test.

Cooling System

Table 2

Status(1)	Description	Specification	Actual	Comments
	Radiator Pressure Relief (Radiator Cap)(2)	-
	Freezing Point of Engine Coolant	-
	Conditioner Test of Engine Coolant	-
	Belt Tension	-		Refer to Operation and Maintenance Manual.
	Difference between the Upper and Lower Radiator Tank Temperatures	-

(1)	N = Normal, M = Monitor, A = Action
(2)	Test for the pressure that is listed on the cap.

Fuel System

Table 3

Status(1)	Description	Specification	Actual	Comments
	Fuel Pressure at High Idle	641 kPa (93 psi)

(1)	N = Normal, M = Monitor, A = Action

Lubrication System

Table 4

Status(1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at Low Idle	107 kPa (16 psi)
	Engine Oil Pressure at Full Load Speed	278 kPa (40 psi)

(1)	N = Normal, M = Monitor, A = Action

Basic Engine

Table 5

Status(1)	Description	Specification	Actual	Comments
	Engine Speed at Low Idle	800 ± 10 rpm
	Engine Speed at High Idle	2165 ± 10 rpm
	Torque Converter Stall Test Engine RPM	1850 ± 10 rpm
	Cylinder Cutout Test	-		Caterpillar Electronic Technician

(1)	N = Normal, M = Monitor, A = Action

Air Inlet and Exhaust System

Table 6

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Stall Test Boost Pressure	201 ± 20 kPa (29 ± 3 psi)
	Cylinder # 1 Exhaust Temperature(2)	-
	Cylinder # 2 Exhaust Temperature(2)	-
	Cylinder # 3 Exhaust Temperature(2)	-
	Cylinder # 4 Exhaust Temperature(2)	-
	Cylinder # 5 Exhaust Temperature(2)	-
	Cylinder # 6 Exhaust Temperature(2)	-

(1)	N = Normal, M = Monitor, A = Action
(2)	Compare the exhaust temperature variance at each exhaust port.

Hydraulic Performance Checks

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Implement Cycle Time-Check

Table 7

Status(1)	Description	Specification	Actual	Comments
	Lift Raise	Lift (8.5 seconds - 9.5 seconds)
	Lift Lower	Power Down (max 5.7 seconds)
	Float	Float (max 4.6 seconds)
	Tilt Back	Rack (4 - 4.8 seconds)
	Dump	Dump (max 4.2 seconds)

(1)	N = Normal, M = Monitor, A = Action

Lift and Tilt Cylinder Drift - Check

Table 8

Status(1)	Description	Specification	Actual	Comments
	Maximum Allowable Cylinder Drift for Lift Cylinder at Oil Temperature of 54° to 70°C (129° to 158°F) over 5 minutes	14 mm (0.6 inch)
	Maximum Allowable Cylinder Drift for Tilt Cylinder at Oil Temperature of 49° to 65°C (120° to 150°F) over 5 minutes	20 mm (0.8 inch)

(1)	N = Normal, M = Monitor, A = Action

Brake Performance Checks

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Table 9

Status(1)	Description	Specification	Actual	Comments
	Brake Accumulator - Test (Test from OMM)
	Service Brake Holding Ability Test- Test (Test from OMM)
	Parking Brake Holding Ability Test- Test (Test from OMM)

(1)	N = Normal, M = Monitor, A = Action

Steering Performance Checks

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Steering Time - Check

Table 10

Status(1)	Description	Specification	Actual	Comments
	Steering time for a full turn from one stop to the other stop (High Idle)	3.3 ± 0.5 seconds

(1)	N = Normal, M = Monitor, A = Action

Hydraulic System

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Piston Pump (Implement) Margin Pressure - Test and Adjust

Table 11

Status(1)	Description	Specification	Actual	Comments
	Implement Piston Pump Margin Pressure at HIGH IDLE	2800 ± 100 kPa (406 ± 15 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Load Sensing Signal) - Test and Adjust

Table 12

Status(1)	Description	Specification	Actual	Comments
	Load Sensing Signal Relief Valve Pressure	25800 ± 700 kPa (3742 ± 102 psi)

(1)	N = Normal, M = Monitor, A = Action

Pressure Reducing Valve (Implement Pilot Oil) - Test and Adjust

Table 13

Status(1)	Description	Specification	Actual	Comments
	Pilot Oil Pressure at Low Idle	3450 ± 200 kPa (500 ± 30 psi)

(1)	N = Normal, M = Monitor, A = Action

Note: Must be in Float

Pilot Oil Accumulator (Dead Engine, Lift Arm Lower) - Test and Charge

Table 14

Status(1)	Description	Specification	Actual	Comments
	Accumulator Pressure (High Idle)	3515 ± 345 kPa (510 ± 50 psi)
	Accumulator Pressure (Dead Engine Lower)	1000 ± 50 kPa (145 ± 7.3 psi)

(1)	N = Normal, M = Monitor, A = Action

Table 15

Charging Pressure and Temperature Relationship for a Typical 1000 kPa (145 psi) Accumulator
Temperature	Pressure
−7 °C (20 °F)	906 kPa (131 psi)
−1 °C (30 °F)	925 kPa (134 psi)
4 °C (40 °F)	943 kPa (137 psi)
10 °C (50 °F)	962 kPa (140 psi)
16 °C (60 °F)	981 kPa (142 psi)
21 °C (70 °F)	1000 kPa (145 psi)
27 °C (80 °F)	1019 kPa (148 psi)
32 °C (90 °F)	1038 kPa (151 psi)
38 °C (100 °F)	1057 kPa (153 psi)
43 °C (110 °F)	1075 kPa (156 psi)
49 °C (120 °F)	1094 kPa (159 psi)

Ride Control Signal Pressure - Check

Table 16

Status(1)	Description	Specification	Actual	Comments
	Ride Control Signal Pressure (Low Idle)	3500 ± 150 kPa (508 ± 22 psi)

(1)	N = Normal, M = Monitor, A = Action

Ride Control Accumulator - Test and Charge

Table 17

Charging Pressure and Temperature Relationship for a Typical 2300 kPa (334 psi) Accumulator
Temperature	Pressure
−7 °C (20 °F)	2083 kPa (302 psi)
−1 °C (30 °F)	2126 kPa (308 psi)
4 °C (40 °F)	2170 kPa (315 psi)
10 °C (50 °F)	2213 kPa (321 psi)
16 °C (60 °F)	2257 kPa (327 psi)
21 °C (70 °F)	2300 kPa (334 psi)
27 °C (80 °F)	2343 kPa (340 psi)
32 °C (90 °F)	2387 kPa (346 psi)
38 °C (100 °F)	2430 kPa (352 psi)
43 °C (110 °F)	2474 kPa (359 psi)
49 °C (120 °F)	2517 kPa (365 psi)

Power Train System

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Transmission Pressures - Test

Table 18

Status(1)	Description	Specification	Actual	Comments
	Clutch "1" Pressure (Reverse in Any Speed)	2100 ± 138 kPa (305 ± 20 psi)
	Clutch "2" Pressure (Forward in Any Speed)	2100 ± 138 kPa (305 ± 20 psi)
	Clutch "3" Pressure (Neutral)	2100 ± 138 kPa (305 ± 20 psi)
	Clutch "4" Pressure (Forward or Reverse/Third Speed)	2100 ± 138 kPa (305 ± 20 psi)
	Clutch "5" Pressure (Second Speed/Forward or Reverse)	2100 ± 138 kPa (305 ± 20 psi)
	Clutch "6" Pressure (First Speed/Forward or Reverse)	2100 ± 138 kPa (305 ± 20 psi)

(1)	N = Normal, M = Monitor, A = Action

Torque Converter Inlet Pressure (High Idle)

Table 19

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Inlet Pressure (High Idle)	925 ± 50 kPa (135 ± 7.5 psi)

(1)	N = Normal, M = Monitor, A = Action

Torque Converter Outlet Pressure (Torque Converter Stall)

Table 20

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Outlet Pressure (Torque Converter Stall)	448 ± 103 kPa (65 ± 15 psi)

(1)	N = Normal, M = Monitor, A = Action

Transmission Lubrication Pressure (High Idle)

Table 21

Status(1)	Description	Specification	Actual	Comments
	Transmission Lubrication Pressure (High Idle)	190 ± 50 kPa (28 ± 7 psi)

(1)	N = Normal, M = Monitor, A = Action

Transmission Oil Pump Pressure (High Idle)

Table 22

Status(1)	Description	Specification	Actual	Comments
	Transmission Oil Pump Pressure (High Idle)	2350 ± 400 kPa (341 ± 58 psi)

(1)	N = Normal, M = Monitor, A = Action

Steering System

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Piston Pump (Steering) High-Pressure Stall - Test and Adjust

Table 23

Status(1)	Description	Specification	Actual	Comments
	High-Pressure Cutoff (High Idle)	27600 ± 350 kPa (4003.0 ± 51.0 psi)

(1)	N = Normal, M = Monitor, A = Action

Piston Pump (Steering) Margin Pressure - Test and Adjust

Table 24

Status(1)	Description	Specification	Actual	Comments
	Margin Pressure (High Idle)	2400 kPa (348 psi)

(1)	N = Normal, M = Monitor, A = Action

Relief Valve (Steering Cylinder Crossover) - Test and Adjust

Table 25

Status(1)	Description	Specification	Actual	Comments
	Relief Valve Steering Cylinder Crossover Pressure	33100 ± 1300 kPa (4801 ± 189 psi)

(1)	N = Normal, M = Monitor, A = Action

Steering Relief Valve (Main Backup) - Test and Adjust

Table 26

Status(1)	Description	Specification	Actual	Comments
	Relief Valve Steering Backup Pressure	30000 ± 700 kPa (4352 ± 102 psi)

(1)	N = Normal, M = Monitor, A = Action

Steering Neutralizer Valve - Check and Adjust

Table 27

Status(1)	Description	Specification	Actual	Comments
	Distance between Front and Rear Frame	12.7 ± 2.54 mm (0.5 ± 0.1 inch)

(1)	N = Normal, M = Monitor, A = Action

Brake and Hydraulic Fan System

Reference: Refer to Testing & Adjusting, M0080189, "986K Large Wheel Loader" for more detail on the following test.

Piston Pump (Brake) Pressure - Test and Adjust

Table 28

Status(1)	Description	Specification	Actual	Comments
	Brake Oil Pressure at High Idle	21600 ± 350 kPa (3133 ± 51 psi)

(1)	N = Normal, M = Monitor, A = Action

Service Brake System Pressure - Test

Table 29

Status(1)	Description	Specification	Actual	Comments
	Rear Service Brake Pressure (Brake ON)	6200 ± 276 kPa (899 ± 40 psi)
	Front Service Brake Pressure (Brake ON)	6200 ± 276 kPa (899 ± 40 psi)

(1)	N = Normal, M = Monitor, A = Action

Brake Accumulator - Test and Charge

Table 30

Accumulator Precharge Pressure/Temperature Relationship for a Typical 6200 kPa (900 psi) Brake Accumulator
Date	Equipment ID Code
Temperature	Pressure 6200 kPa (900 psi)	Actual
−7°C (20°F)	5616 kPa (815 psi)
−1°C (30°F)	5733 kPa (832 psi)
4°C (40°F)	5850 kPa (849 psi)
10°C (50°F)	5967 kPa (866 psi)
16°C (60°F)	6084 kPa (883 psi)
21°C (70°F)	6201 kPa (900 psi)
27°C (80°F)	6318 kPa (917 psi)
32°C (90°F)	6435 kPa (934 psi)
38°C (100°F)	6552 kPa (951 psi)
43°C (110°F)	6669 kPa (968 psi)
49°C (120°F)	6786 kPa (985 psi)

Parking Brake System Pressure - Test

Table 31

Status(1)	Description	Specification	Actual	Comments
	Pump Cut-out Pressure	21000 ± 350 kPa (3046 ± 51 psi)
	Cut-in Valve Pressure	12066 ± 345 kPa (1750 ± 50 psi)
	Cut-out Valve Pressure	15513 ± 345 kPa (2250 ± 50 psi)

(1)	N = Normal, M = Monitor, A = Action

Parking Brake - Check

Table 32

Status(1)	Description	Specification	Actual	Comments
	Low Idle	825 ± 30 RPM
	High Idle	2340 ± 60 RPM

(1)	N = Normal, M = Monitor, A = Action

Hydraulic Fan Speed - Test and Adjust

Table 33

Status(1)	Description	Specification	Actual	Comments
	Maximum Fan Speed	1285 RPM (STD)(2)
		1400 RPM(3)
	Minimum Fan Speed	500 RPM

(1)	N = Normal, M = Monitor, A = Action
(2)	Standard cooling package
(3)	High Ambient cooling package

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, M0069636, "Maintenance Interval Schedule" for more detail on performing S.O.S samples.

Engine Oil Sample

Table 34

Status(1)	Description	Obtain	Comments
	Engine Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Engine Coolant Sample

Table 35

Status(1)	Description	Obtain	Comments
	Engine Coolant Sample

(1)	N = Normal, M = Monitor, A = Action

Hydraulic Oil Sample

Table 36

Status(1)	Description	Obtain	Comments
	Hydraulic Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Inboard Final Drives)

Table 37

Status(1)	Description	Obtain	Comments
	Front Differential & Final Drive Oil Sample
	Rear Differential & Final Drive Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Differential & Final Drive Oil Samples (Outboard Final Drives)

Table 38

Status(1)	Description	Obtain	Comments
	Front Differential Oil Sample
	Rear Differential Oil Sample
	Left Front Final Drive Oil Sample
	Right Front Final Drive Oil Sample
	Left Rear Final Drive Oil Sample
	Right Rear Final Drive Oil Sample

(1)	N = Normal, M = Monitor, A = Action

Transmission/Torque Converter Oil Sample

Table 39

Status(1)	Description	Obtain	Comments
	Transmission/Torque Converter Oil Sample

(1)	N = Normal, M = Monitor, A = Action