Service Manual

ManualsBrandsToro ManualsTrenchersToro 22970

44 PG / PE Series

Refer to Figure 9.

Disassembly

1. Prior to removal of the charge pump cover, place

a mark on the cover and end cap for alignment

at assembly.

2. Using a 1/2 inch wrench, or 5 mm allen wrench,

loosen the charge pump cover bolts (10) from

the end cap (2). While holding the charge cover

in place, remove the charge cover bolts (10).

3. Remove the charge cover, O-ring and gerotor

items (6). Carefully check for and remove the

charge spring and charge ball (44).

4. For the Thru Shaft charge pump, remove the

shaft seal.

Inspection

1. Inspect the charge cover O-ring and running

surfaces for damage. Inspect the spring, check

ball (44), and mating seat in the end cap (2) for

damage or foreign material.

Assembly

REMOVAL, INSPECTION AND

ASSEMBLY OF STANDARD OR

THRU SHAFT CHARGE PUMP

Figure 9. PG / PE Pump Standard or Thru Shaft Charge Pump

NOTE: If the end cap (2) is to be re-

moved from the housing, do not as-

semble the charge pump (6) until the

end cap is installed on the housing.

2. Inspect the charge cover bore for damage,

corrosion or wear.

1. Lubricate the new shaft seal with petroleum

jelly.

2. Press the shaft seal into the charge cover. Be

careful not to damage the seal or charge cover

bore.

3. Position the pump with the input shaft down, and

the end cap (2) horizontal. Place the charge ball

(44) in the end cap (2) charge passage so the

ball mates to the end cap (2) charge ball seat.

Place the charge spring, on top of the charge

ball.

4. Insert the inner gerotor over input shaft (18).

5. Align the outer gerotor to t over the inner

gerotor.

6. Insert the O-ring into the groove in the charge

cover.

7. Position the charge cover and O-ring with the

aligning mark on the end cap. Place the charge

cover and O-ring with aligning mark on the end

cap. Place the charge cover and O-ring as

one piece over the charge spring and gerotor

assembly. Insure the spring ts into the charge

cover spring retaining groove.

8. Align and insert the charge pump cover bolts

(10) into the end cap (2). Tighten to the correct

torque value. See Table 2, page 38. (Torque

Values.)

NOTE: For the Thru Shaft charge pump

follow steps 1-8. For the Standard charge

pump follow steps 3-8.

(2X) 10

THRU SHAFT

STANDARD