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Removal (Fig. 26)
1. Park machine on a level surface, stop engine, en-
gage parking brake, and remove key from the ignition
switch.
2. To prevent contamination of hydraulic system during
gear pump removal, thoroughly clean exterior of pump
assembly.
4. Install new hydraulic oil filter and fill hydraulic reser-
voir with correct oil (see Operator’s Manual).
5. Properly fill hydraulic system (see Charge Hydraulic
System in the Service and Repairs section of this chap-
ter).
6. Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level.
CAUTION
Rotate steering wheel and depress traction ped-
al in both forward and reverse to relieve hydrau-
lic system pressure and to avoid injury from
pressurized hydraulic oil.
3. Operate all hydraulic controls to relieve hydraulic
system pressure.
4. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
NOTE: To ease reassembly, tag hydraulic hoses to
show their correct position on the gear pump.
5. Put drain pan below the gear pump. Remove hydrau-
lic hoses and fittings connected to gear pump. Put plugs
or caps on disconnected hydraulic hoses and open
ports of pump to prevent contamination of the system.
6. Support the gear pump to prevent it from falling (Fig.
27). Remove two (2) cap screws and flat washers retain-
ing gear pump to piston pump.
7. Carefully pull gear pump from piston pump and lower
it out of the machine. Locate and retrieve o–ring from be-
tween pumps.
Installation (Fig. 26)
1. Lubricate new o–ring and position it to gear pump.
Carefully raise gear pump and position it to the piston
pump.
2. Align spline teeth and slide gear pump input shaft
into piston pump coupling. Support gear pump to pre-
vent it from falling while installing two (2) cap screws and
flat washers securing gear pump to piston pump.
3. Remove plugs or caps from disconnected hydraulic
hoses and ports of the gear pump. Lubricate new o–
rings and install fittings and hoses to correct location on
gear pump.
1
2
Figure 27
1. Gear pump 2. Piston pump
Hydraulic
System
Multi Pro 5700–D Page 4 – 31 Hydraulic System