INSPECTION AND REPAIR.

(4) Remove relief valve assembly consisting

(7) Install cover (25). Tighten cover screws

of plug (15), packing (16), valve (17) and spring (18) by

(11) to 25 to 30 foot pounds torque.

pressing out pin (14) from boss on side of cover (25).

(8) Install pressure control valve spring (18)

NOTE

in relief valve bore. Insert valve (17) with hex toward

spring. Install plug (15) with packing (16) in bore and

Some valve parts are under spring pressure.

hold it in position while driving in a new retaining pin

Take care to prevent their being lost when the

(14).

pin is removed. Do not disassemble valve (17).

(9) Install gasket (4) and manifold (I) with

(5) Separate pumpshaft (5), washer (6), seal

washers (3) and screws (2).

(7) and bearing (8) from body (10).

(6) Remove pins (22) from ring (21) and

6-182.

CONTROL VALVE ASSEMBLY.

remove ring, plate (23) and spring (24) from body (10).

6-183.

DISASSEMBLY. Proceed as follows:

6-180. INSPECTION AND REPAIR.

Proceed as

CAUTION

follows:

(1) Inspect surfaces of all parts which are

This

valve

contains

numerous

similar

subject to wear. Light scoring may be removed from

appearing, but not interchangeable, parts.

faces of body (10) with crocus cloth (by placing cloth on

Before

disassembly,

arrange

separate

flat surface), medium India stone or by lapping. Check

containers for parts related to each spool, to

edges of vanes (19) for wear. Vanes must not have

avoid problems at assembly. Equivalent parts

excessive play in slots or burrs on edges. Replace if

with different index numbers on figure 7-22 are

necessary. Check each rotor (20) slot for sticky vanes

not interchangeable.

or wear. Vanes should drop in rotor slots by their own

(1) Unscrew plugs and seals (36 and 37,

weight when both slot and vane are dry.

figure 7-22). Remove nut (1), nut (3) and seals (2).

(2) Replace pumpshaft seal (7) at each

Back out setscrew (4), and remove spring (9) and

overhaul to prevent oil leakage. Check pumpshaft seal

plunger (10). Remove safety relief valve cap (5) and

diameter for wear and scoring. Do not install a new seal

packing (8).

on a pumpshaft (5) which is worn or damaged at seal

(2) Remove packing (6) and retainer (7), seat

diameter. Replace pumpshaft if worn. Stone and polish

(11) spring (12), screen (13), plunger (14) and seat (l5).

sharp edges of pumpshaft to prevent damage to seal.

(3) Remove check valve cap (16), packing

(3) Stone all mating surfaces of body (10 and

(17), spring (18) and poppet (19).

cover (25) with a medium India stone, if necessary, to

(4) Remove screws (22) and retainer plates

remove all burrs and sharp edges. Rewash all parts

(21) from both TILT and HOIST valves. Remove wiper

after stoning.

rings (23), packing retainers (24) and packings (25).

(5) Take off both spool caps (20), and

6-181.

ASSEMBLY.

Liberally coat all parts with

remove retaining rings (26), four spring retainers (27),

automatic transmission fluid and assemble as follows:

springs (29), and washers (28).

(1) Carefully install new seal (7) and pump

(6) Remove packing retainers (30) and

shaft (5) in body (10). Avoid damaging bushing in body,

packings (31).

and seal.

(7) Remove spool (33) and spool (32) from

(2) Install locating pins (22) in pump body.

body (38).

Install ring (21) over pins in correct direction of rotation.

(8) If identification plate (34) must be

(3) Install rotor (20) with chamfered edge of

replaced, remove drive screws (35).

splined hole toward pump body. The chamfer facilitates

assembly.

6-184. CLEANING. Cleaning parts of control valve as

(4) Install vanes (19) with their radius edge

follows:

toward the inner ring contour. packings (12 and 13) in

(1) Wash parts thoroughly in SD. Dry parts

grooves of pump body.

with soft lintfree cloth or with compressed air under

(5) Install packings (12 and 13) in grooves of

moderate pressure.

pump body.

(2) Assure that all fluid passages are free of

(6) Install pressure plate (23) and pressure

obstructions.

plate spring (24).

6-43