TM-9-2320-273-34

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1980

TM-9-2320-273-34 - Page 625 of 801

TM9-2320-273-34

16-22.

a.

b.

Input Shaft Seal Replacement

(Figure 16-9).

Preparation.

(1)

Refer to Output Shaft Seal Replacement preparation, paragraph 16-21.

Procedure.

(1)

Remove bolt (4), Iockwasher (3), and nut (2) from the lower steering column

universal (1) at the gear case, and remove lower steering column. Clean area around the shaft.

(2)

place container under the steering gear, to capture hydraulic fluid lost when lines and seals

are removed. Remove and plug the hydraulic supply and return lines. Plug supply port (10).

(3)

Remove the dust seal (7) and retaining ring (9) from the input shaft and clean the shaft

with emery cloth.

(4)

Hold a shop rag over the input shaft (12) and apply shop air pressure to the valve housing

return port (11).

Wear proper eye protection equipment and

comply with OSHA maximum air pressure

requirements.

The seal assembly (6), the back-up washer (8) and some fluid will pop out of the steering gear (5).

Disconnect the shop air from the housing return port (11) as soon as the seal assembly is out.

(5)

Apply clean grease to the new input shaft seal assembly (6) and to the input shaft (12),

install input shaft seal assembly (6), flatside outward using the seal driver.

(6)

Install the back-up washer (8). Using the seal driver again, press against the back-up

washer (8) until the tool flange seats.

(7)

Install the retaining ring (9), pack the area around the shaft (12) with clean grease and

install the dust seal (7), using the seal driver.

16-20

Change 1

CAUTIO N