TH48-E80 Petroleum Transmission Caterpillar

Note: All 314-9930 Selector and Pressure Control Valve, 261-3383 Selector and Pressure Control Valve and 261-3378 Pressure Control Valve Groups should be modified per Service Magazine, SEPD1360, "Hydraulic Control Modifications for TH48-E80 Petroleum Transmission and SPF343C Pumper Transmission {3074, 3083, 3167}".

Table 1

TH48-E80 ICM Valve History
Control Group	8 Speed No Warm up Feature		7 Speed with Warm-up Feature
	258-8741		314-9942
Valve Group	261-3372	367-2223	314-9940	367-2233
Serial Numbers	1-845	846-Up	1-845	846-Up
Pressure Control Valve	261-3378	367-2179	261-3378	367-2179
Selector Valve	261-3383	375-5500	314-9930	375-5499
Manifold	261-3377	261-3377	261-3377	261-3377

Note: The valve group for serial numbers 1-845 will be identical to the valve group for serial numbers 846 and up after updating per service magazine SEPD1360.

Note: The valve group was updated to reduce clutch power and energy during the shift and increase shift speed to reduce transmission output speed drop during shifting.

Illustration 1	g03033017

(1) 9P-0673 Relief Valve

Installation torque ... 85 ± 10 N·m (63 ± 7 lb ft)

Pressure setting ... 850 ± 103 kPa (123 ± 15 psi)

(2) Torque for 150-4732 Cap ... 85 ± 10 N·m (63 ± 7 lb ft)

(3) 3T-9920 Spring

Length under test force ... 38.6 mm (1.52 inch)

Test force ... 307 ± 25 N (69 ± 6 lb)

Free length after test ... 52.3 mm (2.059 inch)

Outside diameter ... 20.95 mm (0.825 inch)

(4) 145-0107 Spacer

Thickness of spacer ... 1.60 mm (0.063 inch)

Pressure change with one spacer ... 94.3 kPa (13.68 psi)

(5) 145-0105 Spacer

Thickness of spacer ... 0.25 mm (0.010 inch)

Pressure change with one spacer ... 31 kPa (4.5 psi)

145-0106 Spacer

Thickness of spacer ... 0.90 mm (0.035 inch)

Pressure change with one spacer ... 114 kPa (16.5 psi)

145-0107 Spacer

Thickness of spacer ... 1.60 mm (0.063 inch)

Pressure change with one spacer ... 195 kPa (28 psi)

(6) 6T-5409 Spring

Color code ... white stripe

Length under test force ... 72.19 mm (2.84 inch)

Test force ... 1034 N (232 lb)

Free length after test ... 86.8 mm (3.42 inch)

Outside diameter ... 21.34 mm (0.840 inch)

(7) 8M-6402 Spring (outer)

Color code ... red stripe

Length under test force ... 85.8 ± 0.2 mm (3.38 ± 0.01 inch)

Test force ... 840.7 ± 67 N (189 ± 15 lb)

Free length after test ... 110.5 mm (4.35 inch)

Outside diameter ... 19.8 ± 0.2 mm (0.78 ± 0.01 inch)

(7a) 8M-6403 Spring (inner)

Length under test force ... 85.8 ± 0.2 mm (3.38 ± 0.01 inch)

Test force ... 310.2 ± 25 N (69.7 ± 5.6 lb)

Free length after test ... 106.9 mm (4.21 inch)

Outside diameter ... 10.8 mm (0.43 inch)

(8) 5M-3492 Spacer

Thickness of spacer ... 0.25 mm (0.010 inch)

Pressure change with one spacer ... 24 kPa (3.5 psi)

7M-1397 Spacer

Thickness of spacer ... 0.9 mm (0.035 inch)

Pressure change with one spacer ... 87 kPa (12.6 psi)

(9) 6T-3177 Spring

Length under test force ... 32.3 mm (1.27 inch)

Test force ... 89.0 ± 4.0 N (20.0 ± 0.9 lb)

Free length after test ... 44.5 mm (1.75 inch)

Outside diameter ... 21.0 mm (0.83 inch)

(10) Do not put sealant on the threads of the plugs.

(11) 5M-9548 Spring

Length under test force ... 21.3 mm (0.84 inch)

Test force ... 1 ± 0.08 N (0.225 ± 0.018 lb)

Free length after test ... 34.0 mm (1.34 inch)

Outside diameter ... 12.2 mm (0.48 inch)

(12) Torque for two bolts ... 30 ± 7 N·m (22 ± 5 lb ft)

(13) 4M-2381 Spring

Length under test force ... 12.2 mm (0.48 inch)

Test force ... 2.31 ± 0.18 N (0.52 ± 0.04 lb)

Free length after test ... 22.6 mm (0.89 inch)

Outside diameter ... 7.6 mm (0.30 inch)

(14) Torque for two bolts ... 30 ± 7 N·m (22 ± 5 lb ft)

(15) Torque for two bolts ... 30 ± 7 N·m (22 ± 5 lb ft)

(16) Torque for bolt ... 30 ± 7 N·m (22 ± 5 lb ft)

(17) Torque for screen filter ... 6.1 ± 0.7 N·m (54 ± 6 lb in)

(D) Installation depth for the dowel ... 0.80 ± 0.25 mm (0.032 ± 0.010 inch)

(E) Installation depth for the pins ... 1.5 ± 0.5 mm (0.06 ± 0.02 inch)

Note: Use 5P-3931 Anti-Seize Compound to coat the outside surfaces of the pins, prior to assembly. Install the outer pin prior to installing the inner pin. Orientation of the slot in the inner pin must be 180° ± 20° from the slot in the outer pin.

Illustration 2	g00950796
View A-A

(18) Retainer

(19) Torque for two bolts ... 30 ± 7 N·m (22 ± 5 lb ft)

(20) Bolt and washer

(21) Spring assembly

Note: See the Power Train Testing and Adjusting, "Selector and Pressure Control Valve (Transmission) - Adjust" for the proper adjustment procedure.

Illustration 3	g00950797
Section B-B

(F) Installation depth for the dowel ... 4.0 ± 0.5 mm (0.16 ± 0.02 inch)

Illustration 4	g00950799
Section C-C

(10) Do not put sealant on the threads of the plugs.