Service Manual

Topdresser 1800 & 2500 Hydraulic SystemPage 3 – 31
Removal (Fig. 27)
1. Empty Topdresser hopper and position machine on
a level surface. Chock wheels to prevent machine from
moving. If Topdresser is attached to tow vehicle, engage
tow vehicle parking brake, stop engine and remove key
from the ignition switch.
2. Remove brush guard from machine to gain access
to brush motor (see Brush Guard Removal in the Ser-
vice and Repairs section of Chapter 5 – Chassis).
3. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
4. Label all hydraulic connections for assembly pur-
poses. Thoroughly clean hydraulic hoses and fittings
prior to loosening hydraulic lines at brush motor.
5. Disconnect hydraulic lines from hydraulic fittings on
brush motor. Allow hydraulic oil to drain from lines into
a suitable container. Put caps or plugs on open hydraulic
lines and fittings to prevent contamination. Remove and
discard O–rings.
6. Support brush to prevent it from shifting during brush
motor removal.
7. Loosen two (2) set screws (item 11) that secure
brush shaft to brush motor shaft.
8. Support brush motor to prevent it from shifting. Re-
move two (2) cap screws (item 23), flat washers (item
24) and lock nuts (item 2) that secure motor to frame.
Slide brush motor from the brush shaft and remove from
machine. Locate and retrieve woodruff key from motor
shaft.
9. If required, remove hydraulic fittings and O–rings
from the brush motor. Discard O–rings.
Installation (Fig. 27)
1. If removed, install hydraulic fittings with new O–rings
into the brush motor ports (see Hydraulic Fitting Installa-
tion in the General Information section of this chapter).
2. Apply antiseize lubricant to motor shaft. Position
woodruff key into motor shaft keyway.
3. Align motor shaft with brush shaft. Slide motor shaft
into brush shaft and secure brush motor to frame with
two (2) cap screws (item 23), flat washers (item 24) and
lock nuts (item 2). Torque lock nuts from 54 to 66 ft–lb
(74 to 89 N–m).
4. Apply Loctite #242 (or equivalent) to threads of set
screws (item 11). Secure brush shaft to motor shaft by
tightening set screws.
5. Remove caps or plugs that were put on any hydraulic
lines and fittings during disassembly.
6. Lubricate new O–rings with clean hydraulic oil and
position on fittings. Using labels made during removal,
correctly connect and secure hydraulic hoses to hydrau-
lic fittings on brush motor.
7. Check brush adjustment. Brush should be adjusted
evenly across belt area with light bristle contact at top of
belt cleats. If necessary, adjust brush.
8. Install brush guard to machine (see Brush Guard
Installation in the Service and Repairs section of Chap-
ter 5 – Chassis).
Hydraulic
System