Loader Bobcat 773. Manual - part 47

HYDROSTATIC PUMP (Cont’d)

Disassembly And Assembly (Cont’d)

Remove the plug, spring and poppet from the pump end
cap (both pumps) [A].

NOTE: The high pressure relief valves are factory set

and should not be tampered with except for
replacing the complete valve.

Assembly: If the high pressure relief valve and spring are
held in the plug with a retaining ring. Remove and discard
this retaining ring before assembly (per pump
manufacturer’s request). If you have difficulty installing,
use petroleum jelly to hold parts together.

Loosen the four bolts which fasten the two pumps
together [C].

Loosen the high pressure replenishing/relief valve plug
[B].

Assembly: Always use a new O–ring. Tighten the plug to
30–50 ft.–lbs. (41–68 Nm) torque.

Remove the plug, spring and high pressure replenishing
relief valve from the pump end cap (both pumps) [A].

NOTE: S/N 509641106 & Below and S/N 509616589 &

Below use replenishing valves only.

A

CD–10751

B–14078

1.  Plug
2.  Spring
3.  Relief Valve

3

2

1

C

CD–10752

773 BICS Loader

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Service Manual

B

CD–10750

HYDROSTATIC PUMP (Cont’d)

Disassembly And Assembly (Cont’d)

Assemble: Tighten the four bolts to 35–45 ft.–lbs. (47–61
Nm) torque [A].

Separate the two pumps [B].

Remove the pump coupler [C].

Remove the large O–ring [D].

A

CD–10753

C

CD–10755

D

CD–10756

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773 BICS Loader

Service Manual

B

CD–10754

HYDROSTATIC PUMP (Cont’d)

Disassembly And Assembly (Cont’d)

Remove the two small O–rings (Items 1 & 2) [A].

Remove the four bolts from the pump housing end cap
[B].

Assemble: Tighten the bolts to 35–45 ft.–lbs. (47–61
Nm) torque [C].

Remove the pump housing end cap. Remove the valve
plate from the end cap [D].

Check the brass valve plate on both sides for damage &
replace if worn or damaged.

A

CD–10757

1

2

C

CD–10759

D

CD–10760

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Service Manual

B

CD–10758

HYDROSTATIC PUMP (Cont’d)

Disassembly And Assembly (Cont’d)

Assemble: Make sure the valve plate notch is located
over the dowel and the feathering groove is correct for the
pump rotation [A].

Put your hand over the rotating group and turn the pump
housing over and let the rotating group slide into your
hand [B].

Remove the key from the drive shaft [C].

Remove the snap ring [D].

Assemble: If a beveled snap ring is used, install the snap
ring with its beveled side out.

A

CD–10761

C

CD–10763

D

CD–10764

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773 BICS Loader

Service Manual

B

CD–10762