Service Manual

47PG / PE Series

Refer to Figure 12.

Disassembly

1. Tilt the pump on its side, drain remaining oil. Lift

out the cylinder block assembly (25).

2. Remove the pistons, springs and piston seats.

Inspection

1. Inspect the running surface of the cylinder block

and piston ends for damage, nicks or unusual

wear patterns. The running surface may show

evidence of minor abrasion. This will be normal

wear. If grooved or smeared, replace with a new

cylinder block assembly.

2. Inspect the piston springs for distortion or

breaks. If necessary, replace with a new cylinder

block kit.

3. Inspect the piston seats. Residual oil may

cause these to remain stuck to the inside of the

pistons.

REMOVAL, INSPECTION AND

ASSEMBLY OF THE CYLINDER

BLOCK

Figure 12. PG / PE Pump Cylinder Block

Assembly

1. Install piston seats into the end of the pistons.

2. Install springs into the pistons.

3. Install one at a time, pistons, springs and seats

as one assembly into the cylinder block.

4. With the pump housing tilted on its side, install

the cylinder block assembly (25) with pistons

contacting the thrust bearing.

NOTE: To check that piston placement is

correct, push downward on the cylinder

block assembly (25). If this results in a

spring action the block assembly has

been installed correctly. If this cannot be

accomplished, remove and reassemble

the block assembly. Place a rubber band

around the cylinder block pistons to hold

them in position during installation. Then

after installation cut the rubber band and

remove it. Check cylinder block assem-

bly for spring action.