Replacing Idler Arm Bushings - Toro Z355 Z-Master Operator's Manual

4. Insert a pin punch into the castor hub and carefully
drive out the bushings (Fig. 77). Clean the inside of
the mounting tube.
5. Grease the inside and outside of the new bushings. Use
a hammer and flat plate to carefully drive the bushings
into the castor hub (Fig. 77).
6. Inspect the castor wheel fork for wear and replace if
necessary (Fig. 76).
7. Slide the castor wheel fork through the bushings in the
castor hub. Replace the 1/2 inch spacer and thrust
washer onto the fork and secure with the cap (Fig 76).
Important The inside diameter of the bushings may
collapse slightly when installed. If the castor wheel fork
does not slide into the new bushings, ream both bushings
to an inside diameter of 1–1/8 inch.
8. Grease the fitting on the carrier frame castor hub using
No. 2 general purpose lithium base or molybdenum
base grease.
2
1
2
Figure 77
1. Carrier Frame Castor Hub
m–3282
2. Bushing
43

Replacing Idler Arm Bushings

There are idler arms for the blower belt, PTO belt and
traction belt. All three idler arms have pressed in
bushings. To check the bushings, move the idler arms
side-to-side and examine for wear. If the idler arms are
loose, the bushings are worn and must be replaced.
1. Disengage the power take off (PTO) and turn the
ignition key to off. Remove the key.
2. Remove tension on idler arms and remove belt from
the idler. See one of the following figures 78, 79 or 80
that shows the idler you are checking.
3. Inspect the idler pivot pin assembly for wear and
replace if necessary. To check the bushings, move the
idler arms side-to-side and examine for wear.
4. If the idler arms are loose, the bushings are worn and
must be replaced. Remove the hardware securing the
idler pivot arm to the mower.
5. Insert a pin punch into the idler arm and carefully
drive out the bushings (Figures 78, 79 or 80). Clean
the inside of the idler arm.
6. Use a hammer and flat plate to carefully drive new
bushings into the idler arm (Figures 78, 79 or 80).
7. Install the idler arm back onto the machine.
Note: Grease the PTO idler arm using No. 2 general
purpose lithium base or molybdenum base grease.
8. Install the belt back onto idler pulley.
4 6
1
7
3
2
Figure 78
1. Pump Idler Pulley
2. Idler arm
3. Bushing
4. Nut
5. Bolt
10
9
5
8
m–5299
6. Washer
7. Spacer
8. Shoulder bolt
9. Spring
10. Traction Belt