INSTALLATION - TM-10-3930-644-14-P0354

TM 10-3930-644-14&P

with light oil.

F. INSTALLATION

CAUTION

NOTE

Do not tap or force bushings into

If the splines of the original coupling

bores.

They should slide to the

are worn, replace coupling.

bottom by hand force.

1. Install the pump and the mounting bracket onto

Be sure bushings bottom in housing and that

the front of the engine. Reconnect the hydraulic

back-up rings do not fall off.

lines to the hydraulic pump.

3. Turn pump body so priority valve bore is to the

2. Check the hydraulic oil reservoir to be sure the

left, thin place drive gear (long shaft) in top bore

oil level is correct. Run pump for one minute at

and idler gear (short shaft) in lower bore. Coat

no load, idle speed, to allow the system to fill.

Journals and gear faces lightly with oil.

Check for any pressure or air leaks in the

system at this time. After one minute of running,

4. Place bushing dowel between the two front

shut engine off and recheck oil level in reservoir.

bushings. Hold bushings together, and insert

If low, fill to proper level as Indicated by Full

face down into the pump bores.

,mark on oil level dipstick.

CAUTION

NOTE

Do not force bushings in. They will

If severe foaming is observed, it

slide in smoothly if properly aligned.

indicates a suction leak or improper

oil, and must be corrected.

Place the bushing O Ring and then the back-up

rings on the bushing shoulders.

3. Set the main hydraulic relief pressure

(adjustable.

valve located in control valve

5. Place the two drain O Rings in the two small

assembly) to the following:

recesses in the face of the body on the inlet side

of the pump and place the body O Ring in its

1900-2000 psi

recess around the bushings.

4. Install a pressure gauge (2000 psi) in the

6. Place the priority valve spring in the valve spool,

pressure side of the steering circuit. With the

coat the spool with oil, and install it (spring end

hydraulic pump operating at full speed, turn the

last) into the valve bore.

steer wheels to their limit. The opening pressure

should be set at 1100 psi by adjusting the pump

7. Install plug in spool bore.

relief valve setscrew IN or OUT.

8. To replace seals in the end plate, first press in

5. Always start the hydraulic pump under no load

the oil seal with the lip pointed in, then press in

conditions to prolong pump life.

Refer to

the air seal with the lip pointed out. Install the

SPECIFICATIONS of LUBRICANTS for proper

end plate on the pump, taking care not to

oil to use.

damage the seals on the shaft. Before sliding

end plate all the way down, check to see that all

6. Install the radiator grille and components which

O Rings and back-up rings are still in place.

were removed to gain access to the pump.

9. Tighten capscrews firmly. Turn shaft of pump to

see if it has some drag, but can still be turned by

hand.

10. Install the relief valve components in the same

position from which they were removed in the

relief valve bore. Tighten plug until it bottoms.

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