Toro Groundsmaster 4100-D Service Manual page 121

Removal (Fig 57)
1. Park machine on a level surface, lower cutting deck,
stop engine, engage parking brake and remove key
from the ignition switch.
2. Raise and support machine to gain access to gear
pump from the underside of the machine.
3. Drain the hydraulic reservoir.
4. To prevent contamination of hydraulic system during
pump removal, thoroughly clean exterior of pump and
fittings.
5. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of this section.
6. Disconnect hydraulic lines from gear pump and put
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper installation.
7. Support gear pump assembly to prevent it from fal-
ling.
8. Remove two (2) cap screws and washers that secure
gear pump to piston pump. Remove gear pump, cou-
pler, spacer and O--rings from machine through the seat
opening.
9. If hydraulic fittings are to be removed from gear
pump, mark fitting orientation to allow correct assembly.
Remove fittings from pump and discard O--rings.
Groundsmaster 4100--D/4110--D
Installation (Fig 57)
1. If fittings were removed from gear pump, lubricate
and place new O--rings onto fittings. Install fittings into
port openings using marks made during the removal
process to properly orientate fittings. Tighten fittings
(see Hydraulic Fitting Installation in the General Infor-
mation section of this chapter).
o
A. If 90 hydraulic suction fitting (item 8) and straight
fitting (item 9) were removed from gear pump, torque
fittings from 103 to 118 ft- -lb (140 to 160 N- -m).
2. Slide coupler onto the piston pump output shaft.
3. Lubricate new O--rings (item 13) with clean hydraulic
oil. Position O--rings and spacer to gear pump.
4. Apply Loctite #242 (or equivalent) to threads of cap
screws (item 19).
5. Align gear teeth and slide gear pump input shaft into
coupler. Secure gear pump to piston pump with two (2)
cap screws and washers. Torque cap screws from 79 to
84 ft- -lb (108 to 113 N- -m).
6. Remove caps or plugs from all hydraulic lines and fit-
tings. Using labels placed during pump removal, proper-
ly install hydraulic lines to gear pump (see Hydraulic
Hose and Tube Installation in the General Information
section of this chapter).
7. Lower machine to ground.
8. Replace hydraulic filter and fill hydraulic reservoir
with new hydraulic oil.
9. Disconnect engine run solenoid electrical connector
to prevent engine from starting. Prime the hydraulic
pump by turning the ignition key switch to start and crank
the engine for ten (10) seconds. Wait fifteen (15) sec-
onds to allow the starter motor to cool and then repeat
cranking procedure again.
10.Connect engine run solenoid electrical connector,
start the engine and check for proper operation.
11. Properly fill hydraulic system (see Charge Hydraulic
System in this section).
12.Stop engine and check for hydraulic oil leaks. Check
hydraulic reservoir oil level.
Page 4 - - 83 Hydraulic System