Hydraulic Pump A S S E M B - Chevrolet 1988 Light Duty Truck Repair Manual

3B3-22 POWER STEERING
RETURN TUBE
Im p o rtan t
Plug the return tube (1) to prevent chips from
entering the pump.
R em ove or D is co n n e c t (F ig u re 51)
1. Pump from the vehicle if necessary for access.
2. Dam aged return tu b e (1) using, tap, nut, and
washers.
Im po rtant
• R em ove the p lu g and any c h ip s b efo re
installing the return tube.
Install or C o n n e c t (F ig u re 52)
• Coat the end of the new return tube (1) using Locite
s o lv e n t 7 5 5 5 9 a n d
equivalent.
1. Press the return tube (1) into the housing (2) until
bottomed.
HYDRAULIC PUMP ASSEMBLY
DISASSEMBLE
R em ove or D is c o n n e c t (F ig u res 48 and 53)
1. Retaining ring (20) using a punch in the access
hole.
• G ently push on the drive shaft (8) to assist in
removing end cover (19), O-ring (18), pressure plate
Figure 51 — Return Tube Removal
L o c ite 29 0 a d h e s iv e , or
spring (17), pum p ring (11), pum p vanes (12), and
drive shaft sub assembly consisting of:
— Pump rotor (13).
— Thrust plate (10).
— Drive shaft (8).
— Shaft retaining ring (14).
2. O-ring (16) from housing (2).
3. Dowel pins (9).
4. Drive shaft seal (3).
5. Pressure plate (5), pressure plate spring (17), and
O-ring (18) from the end cover (19).
6. Shaft retaining ring (14) from the drive shaft (8).
7. Pump rotor (13) and thrust plate (10) from the drive
shaft (8).
CLEANING AND INSPECTION
I J i
Clean
All parts in power steering fluid.
Dry parts.
Inspect
P um p ring (11), vanes (12), th ru s t plate (10), and
drive sh a ft (8) for scoring, p ittin g or ch a tte r marks.
If noted, replace the a p p ro p ria te parts.
Figure 53— Retaining Ring Removal