Toro GroundsmasterR 4300-D Service Manual page 221

Removal (Fig. 20)
1. Park machine on a level surface, lower cutting
decks, stop engine, engage parking brake and remove
key from the ignition switch.
2. Remove cutting deck from front lift arm to be re-
moved (see Cutting Deck Carrier Frame Removal in the
Service and Repairs section of Chapter 7 -- Cutting
Decks).
3. Disconnect lift cylinder from lift arm (Fig. 21):
A. Remove one (1) retaining ring and thrust washer
from the cylinder pin that secures lift cylinder to lift
arm.
B. Pull cylinder pin from the lift cylinder and lift arm.
Locate and retrieve second thrust washer.
C. Pivot lift cylinder rod end away from lift arm.
4. Remove fasteners that secure tipper bracket (item 7
or 8) to machine. Remove tipper bracket.
5. Slide front lift arm from lift arm pivot shaft.
6. Inspect flange bushings in lift arm for wear or dam-
age. If necessary, replace bushings:
A. Use bushing removal tool to extract bushings
from the lift arm. Take care to not damage the bore.
B. Clean the inside of the bore to remove any dirt or
foreign material.
C. Apply grease to the inside and outside of the new
bushings.
D. Use an arbor press to install the bushings into lift
arm. Lift arm bushings should be pressed until bush-
ing flange is against lift arm bore.
E. After bushing installation, make sure that lift arm
slides easily onto pivot shaft. If binding is noted, lo-
cate and correct source of binding.
7. If necessary, remove cap screw that secures pivot
shaft (item 16) in lift arm. Remove pivot shaft from lift
arm.
8. If necessary, remove roll pin (item 3) and lift arm pivot
shaft (item 14) from frame. Discard roll pin.
Installation (Fig. 20)
1. If lift arm pivot shaft (item 14) was removed from
frame, apply antiseize lubricant to pivot shaft surface
and insert shaft into frame. Align holes in frame and pivot
shaft. Secure pivot shaft with new roll pin.
Groundsmaster 4300--D
2. If pivot shaft (item 16) was removed from lift arm, in-
sert pivot shaft in lift arm and secure with cap screw
(item 19).
3. Slide front lift arm onto pivot shaft.
4. Secure front lift arm to machine:
A. Apply Permatex Blue Gel Threadlocker (or equiv-
alent) to threads of screws (items 9, 12 and 18).
B. Position tipper bracket to lift arm and frame
bracket.
C. Install screws, flat washers (items 11 and 13) and
flange nut (item 6) to tipper bracket, pivot shaft and
frame bracket.
D. Torque 1/2" fasteners (items 9 and 18) from 75 to
95 ft- -lb (102 to 128 N- -m). Then, torque 5/8" fasten-
ers (item 18) from 135 to 165 ft- -lb (183 to 223 N- -m).
5. Connect lift cylinder to lift arm (Fig. 21):
A. Align lift cylinder rod end to lift arm mounting hole
B. Slide cylinder pin with retaining ring and thrust
washer through the lift cylinder and lift arm.
C. Install second thrust washer on pin and secure
with second retaining ring.
6. Mount cutting deck to lift arm (see Cutting Deck Car-
rier Frame Installation in the Service and Repairs sec-
tion of Chapter 7 -- Cutting Decks).
7. Lubricate lift arm and lift cylinder grease fittings.
3
4
5
4
3
1. Lift arm (#1 shown)
2. Lift cylinder
3. Retaining ring
Page 6 - - 23
2
1
Figure 21
4. Thrust washer
5. Cylinder pin
Chassis