993K Wheel Loader TA2 Technical Inspection {0372, 1000, 7000, 753T, 7565} Caterpillar

Wheel Loader

993K (S/N: Z4D1-UP; Z8D1-UP; Z4Z1-UP; Z8Z1-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.

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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 in order 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	18 VDC to 32 VDC		Refer to Special Instruction, UENR0950, "Charging System - Test".
	Electric Starting System Test	12 to 16 V at −23° C (−10° F) to −7° C (19° F)		Refer to Special Instruction, UENR0950, "Charging System - Test".
		14 to 18 V at −7° C (19° F) to 10° C (50° F)
		16 to 24 V at 10° C (50° F) to 27° C (80° F)

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

Engine

Reference: Testing & Adjusting, UENR0950 for more detail on the following tests.

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	2.7 ± 5°C (5 ± 9°F)
	Jacket Water Inlet Temperature from Cooling System	90° ± 3°C (194° ± 5°F)

(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	703 ± 234 kPa (102 ± 34 psi)

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

Lubrication System

Table 4

Status(1)	Description	Specification	Actual	Comments
	Engine Oil Pressure at Low Idle	276 to 600 kPa (15 to 87 psi)
	Engine Oil Pressure at Full Load Speed (1800 RPM)	103 to 600 kpa (40 to 87 psi)

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

Basic Engine

Table 5

Status(1)	Description	Specification	Actual	Comments
	Engine Speed at Low Idle	900 ± 10 rpm
	Engine Speed at High Idle	1900 ± 10 rpm
	Torque Converter Stall Test Engine RPM	1250 ± 10 rpm
	Cylinder Cutout Test	-		Caterpillar Electronic Technician
	Engine Crankcase Pressure (Blowby)	-

(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	174.5 ± 27.94 CM_HG (68.7 ± 11 IN_HG)
	Cylinder # 1 Exhaust Temperature(2)	-
	Cylinder # 2 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 3 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 4 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 5 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 6 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 7 Exhaust Temperature ***#i05043249/d1448e1012***	-
	Cylinder # 8 Exhaust Temperature ***#i05043249/d1448e1012***	-

(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, KENR5566, "Hydraulic System" for more detail on the following test.

Implement Cycle Time-Check

Table 7

Status(1)	Description	Specification	Actual	Comments
	Rack Back	2.4 seconds
	Lift	9.2 seconds
	Dump (Max Lift)	1.8 seconds
	Power Down	3.8 seconds
	Float Down	3.7 seconds

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

Pump Performance (Implement) (Lift Time) - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Pump Performance (Implement) (Lift Time) - Test" for further instruction.

Lift and Tilt Cylinder Drift - Check

This check is performed using the operator monitor. Refer to Testing and Adjusting, "Lift and Tilt Cylinder Drift - Check".

Brake Performance Checks

Reference: Refer to Testing & Adjusting, KENR5566, "Brake System" for more detail on the following test.

Table 8

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, KENR5566, "Steering System" for more detail on the following test.

Steering Time - Check and Adjust

Table 9

Status(1)	Description	Specification	Actual	Comments
	Steering Time for a Full Turn from Stop to Stop (High Idle)	4.5 ± 0.3 Seconds
	Steering Time for a Full Turn from Stop to Stop (Low Idle)	7.0 ± 0.3 Seconds

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

Hydraulic System

Reference: Refer to Testing & Adjusting, KENR5566, "Hydraulic System" for more detail on the following test.

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

Table 10

Status(1)	Description	Specification	Actual	Comments
	Pressure Reducing Valve (Implement Pilot Oil) Pressure	1580 ± 150 kPa (230 ± 22 psi)

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

Pilot Control Actuator Pressure - Check

Table 11

Status(1)	Description	Specification	Actual	Comments
	Pilot Control Actuator Pressure	3500 ± 150 kPa (508 ± 22 psi)

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

Piston Pump (Implement) Main Relief Valve Pressure - Test and Adjust

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Piston Pump (Implement) Main Relief Valve Pressure - Test and Adjust" for further instruction.

Relief Valve (Pilot Control Pressure) - Test

Table 12

Status(1)	Description	Specification	Actual	Comments
	Relief Valve (Pilot Control Pressure	3450 ± 350 kPa (500 ± 50 psi)

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

Relief Valve Pressure (Line) - Test and Adjust

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Relief Valve Pressure (Line) - Test and Adjust" for further instruction.

Ride Control Accumulator - Test and Charge

Refer to Special Instruction, REHS5464, "Accumulator Discharging and Charging Procedures" for the required tooling and the testing and charging procedure.

Specifications

Table 13

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, KENR5566, "Power Train System" for more detail on the following tests.

Tire Pressure

Table 14

Status(1)	Description	Specification	Actual	Comments
	Front Left Tire Pressure			See Tire Manufacture Recommendations
	Front Right Tire Pressure			See Tire Manufacture Recommendations
	Rear Left Tire Pressure			See Tire Manufacture Recommendations
	Rear Right Tire Pressure			See Tire Manufacture Recommendations

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

Impeller Clutch Pressure - Test

Table 15

Status(1)	Description	Specification	Actual	Comments
	Impeller Clutch Setting (High 100%)	1825 ± 135 kPa (265 ± 20 psi)

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

Torque Converter Impeller Clutch Pressure - Test and Torque Converter Lockup Clutch Pressure - Test

Refer to Testing and Adjusting, "Torque Converter Impeller Clutch Pressure - Test" for further instruction and specifications.

Torque Converter Stall (1FWD) - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Torque Converter Stall (1FWD) - Test" for further instruction.

Torque Converter Stall (3FWD) - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Torque Converter Stall (3FWD) - Test" for further instruction.

Torque Converter Stall and Implement Pump Double Stall - Test

This test is performed using the operator monitor. Refer to Testing and Adjusting, "Torque Converter Stall and Implement Pump Double Stall - Test" for further instruction.

Table 16

Status(1)	Description	Specification	Actual	Comments
	Raise double stall engine speed	1480 ± 50 RPM

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

Test for the Transmission Clutch Pressure

Refer to Testing and Adjusting, "Transmission Pressures - Test" for further instruction.

Table 17

Status(1)	Transmission Pressure				Comments
	Pressure	Position of Governor Control Lever		Actual
		Pressure at Low Idle	Pressure at High Idle
	Oil Pump	This pressure is identical to speed clutch pressure P1.	This pressure is identical to speed clutch pressure P1.
	Speed Clutch P1 (Initial Pressure)	The pressure is 530 ± 20 kPa (76 ± 3 psi) when the direction switch is in the NEUTRAL position and plug (29) for the load piston is removed.	-
	Speed Clutch P1	This pressure must not be more than 350 kPa (50 psi) below the pressure at high idle. Plug (29) for the load piston is installed.	This pressure is 2570 ± 105 kPa (375 ± 15 psi) when the direction switch is in FORWARD or in REVERSE and any speed is selected. Plug (29) for the load piston is installed.
	Direction Clutch P2	This pressure is 380 ± 35 kPa (55 ± 5 psi) lower than the speed clutch pressure at pressure tap (F). Plug (29) for the load piston is installed.	This pressure is 380 ± 35 kPa (55 ± 5 psi) lower than the speed clutch pressure at pressure tap (F). Plug (29) for the load piston is installed.
	Transmission Lubrication Oil	-	The minimum pressure is 69 kPa (10 psi).

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

Torque Converter Inlet Pressure (High Idle)

Table 18

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Inlet Pressure (High Idle)	930 kPa (135 psi)

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

Torque Converter Outlet Pressure (High Idle)

Table 19

Status(1)	Description	Specification	Actual	Comments
	Torque Converter Outlet Pressure (Torque Converter Stall)	550 ± 140 kPa (80 ± 20 psi)

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

Transmission Lubrication Pressure (High Idle)

Table 20

Status(1)	Description	Specification	Actual	Comments
	Transmission Lubrication Pressure (High Idle)	69 kPa (10 psi)Minimum

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

Transmission Oil Pump Pressure (High Idle)

Table 21

Status(1)	Description	Specification	Actual	Comments
	Transmission Oil Pump Pressure (High Idle in forward or reverse with any speed selected)	2570 ± 105 kPa (375 ± 15 psi)

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

Steering System

Reference: Refer to Testing & Adjusting, KENR5566, "Steering System" for more detail on the following tests.

Steering System Pressure (High Pressure Stall) - Test and Adjust

Table 22

Status(1)	Description	Specification	Actual	Comments
	Piston Pump (Steering) High Pressure Stall - Test	31000 kPa (4500 psi)

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

Piston Pump (Steering) Margin Pressure - Test and Adjust

Table 23

Status(1)	Description	Specification	Actual	Comments
	Margin Pressure	2100 kPa (305 psi)

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

Steering Pilot System Pressure - Test and Adjust

Table 24

Status(1)	Description	Specification	Actual	Comments
	Steering Pressure Reducing Valve	1650 ± 150 kPa (240 ± 22 psi)
	Pilot Relief Valve Pressure	3450 ± 345 kPa (500 ± 50 psi)

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

Relief Valve (Steering Cylinder Crossover) - Test and Adjust

Table 25

Status(1)	Description	Specification	Actual	Comments
	Steering Cylinder Crossover Relief Valve	31000 ± 700 kPa (4500 ± 100 psi)

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

Relief Valve (Pump Backup) - Test and Adjust

Table 26

Status(1)	Description	Specification	Actual	Comments
	Relief Valve (Pump Backup) - Test	34500 ± 700 kPa (5000 ± 100 psi)

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

Steering Neutralizer Valve - Check

Table 27

Status(1)	Description	Specification	Actual	Comments
	Pressed Putty Thickness	25.4 mm (1 inch)

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

Brake and Hydraulic Fan System

Reference: Refer to Testing & Adjusting, KENR5566, "Braking and Hydraulic Fan System" for more detail on the following tests.

Hydraulic Fan Speed - Test and Adjust

Table 28

Status(1)	Description	Specification	Actual	Comments
	Max Fan Speed	1400 ± 50 RPM
	Minimum Fan Speed	500 ± 50 RPM

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

Piston Pump Cutoff Pressure (Hydraulic Fan) - Test and Adjust

Table 29

Status(1)	Description	Specification	Actual	Comments
	Cutoff Pressure	24000 ± 350 kPa (3480 ± 50 psi)

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

Piston Pump Margin Pressure (Hydraulic Fan) - Test and Adjust

Table 30

Status(1)	Description	Specification	Actual	Comments
	Margin Pressure	2100 ± 100 kPa (305 ± 15 psi)
	Engine Fan Bypass Override	4650 to 9050 kPa (675 to 1313 psi)

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

Piston Pump (Brake) Pressure - Test and Adjust

Table 31

Status(1)	Description	Specification	Actual	Comments
	Brake Oil Pressure	16000 ± 345 kPa (2300 ± 50 psi)

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

Service Brake System Pressure - Test

Table 32

Status(1)	Description	Specification	Actual	Comments
	Service Brake Pressure (Brake ON) (Front and Rear)	8625 ± 350 kPa (1250 ± 50 psi)

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

Service Brake Discs - Check

Table 33

Status(1)	Description	Specification	Actual	Comments
	Right Front Indicator	See Table 34
	Left Front Indicator	See Table 34
	Right Rear Indicator	See Table 34
	Left Rear Indicator	See Table 34

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

Table 34

Disc Thickness Wear Chart
Estimated Percentage of Remaining Brake Disc Life	Remaining Thickness of Disc	Oil Groove Depth(1)
100	5.08 mm (0.200 inch)	0.64 mm (0.025 inch)
80	4.95 mm (0.195 inch)	0.58 mm (0.023 inch)
60	4.82 mm (0.190 inch)	0.51 mm (0.020 inch)
40	4.70 mm (0.185 inch)	0.45 mm (0.018 inch)
20	4.57 mm (0.180 inch)	0.38 mm (0.015 inch)
0	4.44 mm (0.175 inch)	0.32 mm (.013 inch)

(1)	Groove depth is the most critical measurement.

Parking Brake System Pressure - Test

Table 35

Status(1)	Description	Specification	Actual	Comments
	Accumulator Pressure with Engine Running	13789 ± 345 kPa (2000 ± 50 psi)
	Accumulator Pressure at which the Parking Brake Engages	< 6550 kPa (950 psi)

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

Parking Brake - Test

Reference: Refer to the Operation and Maintenance Manual, SEBU8652, "Braking System - Test" for specific information regarding the Parking Brake Test.

S·O·S Samples

Reference: Refer to Operation and Maintenance Manual, SEBU8652, "Maintenance Interval Schedule" for more detail on performing S.0.S samples.

Engine Oil Sample

Table 36

Status(1)	Description	Obtain	Comments
	Engine Oil Sample

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

Engine Coolant Sample

Table 37

Status(1)	Description	Obtain	Comments
	Engine Coolant Sample

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

Hydraulic Oil Sample

Table 38

Status(1)	Description	Obtain	Comments
	Hydraulic Oil Sample

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

Differential & Final Drive Oil Samples (Inboard Final Drives)

Table 39

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 40

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 41

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

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