Groundsmaster 4100--D/4110--D Hydraulic SystemPage 4 -- 83
Removal (Fig 57)
1. Park machine on a level surface,lowercuttingdeck,
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. Topreventcontaminationofhydraulicsystemduring
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
capsorplugsonopenhydraulic linesand fittings.Label
disconnected hydraulic lines for proper installation.
7. Support gear pump assembly to prevent it from fal-
ling.
8. Removetwo(2)capscrewsandwashersthatsecure
gear pump to piston pump. Remove gear pump, cou-
pler,spacerandO--ringsfrommachinethroughtheseat
opening.
9. If hydraulic fittings are to be removed from gear
pump,markfittingorientationtoallowcorrectassembly.
Remove fittings from pump and discard O--rings.
Installation (Fig 57)
1. If fittings were removed from gear pump, lubricate
and place new O--r ings 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).
A. If90
o
hydraulicsuctionfitting(item8)andstraight
fitting(item9)wereremovedfromgearpump,torque
fittings from 103 to 118 ft--lb (140 to 160 N--m).
2. Slide coupler onto the piston pump output shaft.
3. LubricatenewO--rings(item13)withcleanhydraulic
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 teethandslidegear pump inputshaftinto
coupler. Secure gear pump to piston pump with two (2)
capscrewsandwashers.Torquecapscrewsfrom79to
84 ft--lb (108 to 113 N--m).
6. Removecapsorplugsfromallhydrauliclinesandfit-
tings.Usinglabelsplacedduringpumpremoval,proper-
ly install hydraulic lines to gear pump (see H ydraulic
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 runsolenoid electricalconnector
to prevent engine from starting. Prime the hydraulic
pumpbyturningtheignitionkeyswitchtostartandcrank
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(seeChargeHydraulic
System in this section).
12.Stopengineandcheck forhydraulicoilleaks.Check
hydraulic reservoir oil level.
Hydraulic
System
To Next Page
Loading...
Need help?
General
