39
MAINTENANCE
Figure 65
1. Tension Arm 2. Jam Nuts
1
2
Outboard Cutting Units -
1.
Remove deck covers. To check belt tension, apply
8 lb. (35.5 N) force at mid-span of belt and check
deflection. There should be approximately 5/16 in. (7.9
mm) deflection. If deflection is incorrect, proceed to
step 2. If deflection is correct, proceed to step 3.
2.
To tension belts, loosen flange locknut at top of
idler pulley (Fig. 66). Slide pulley against belt until
proper tension is reached. Hold pulley in position and
tighten locknut.
Figure 66
1. Idler Pulley Flange Locknut
2. Drive Belts
1
2
3.
Replace deck covers.
REPLACING BLADE DRIVE BELTS
Position machine on level surface, lower cutting unit to
shop floor, engage parking brake, shut engine off and
remove key from ignition switch.
Front Cutting Unit
-
Note:
To remove center section belt, wing spindle drive
belts must first be removed.
1.
Remove deck covers. Lift each wing to release idler
pulley tension and slip belt off pulleys.
2.
Loosen jam nuts securing tension plate until
compression spring on idler assembly is relaxed
(Fig. 65).
3.
Remove idler pulley belt retainer.
4.
Remove flange head screws securing gearbox
plate and separate plate and drive motor assembly
from the deck (Fig. 63). Be careful not to bend, twist,
kink or damage flexible hydraulic lines.
5.
Remove old belt. Position new belt in pulleys and
assemble gear box and plate assembly to deck.
6.
Adjust belt tension; refer to Adjusting Cutting Unit
Belt Tension.
7.
Install idler pulley belt retainer.
8.
Install wing drive belts. Lift wings to allow belts to
slip over outer drive spindle pulleys and install covers.
Outboard Cutting Units -
Note:
To remove lower belt, the other two belts must
first be removed.
1.
Position machine on level surface, lower cutting
unit to shop floor, engage parking brake, shut engine
off and remove key from ignition switch.
2.
Remove deck covers. Loosen flange locknuts on
idler pulleys and slide pulleys away from belts.
3.
Remove flange head screws securing gearbox
plate to deck. To separate plate and drive motor
assembly from deck, rotate plate end toward traction
unit (Fig. 66). Tip plate, motor and pulley assembly on
its side and remove from deck. Be careful not to bend,
twist, kink or damage flexible hydraulic lines.
4.
Remove belt(s). Position new belt(s) in pulleys and
assemble gear box and plate assembly to deck.
5.
Adjust belt tension; refer to Adjusting Cutting Unit
Belt Tension.
SEPARATING CUTTING UNITS FROM
TRACTION UNIT
Front Cutting Unit -
1.
Position machine on level surface, lower cutting
unit to shop floor, engage parking brake, shut engine
off and remove key from ignition switch.
2.
Remove deck covers and relieve belt tension on all
belts (Fig. 65).
3.
Remove flange head screws securing gearbox
plate and separate plate and drive motor assembly
from the deck (Fig. 63). Be careful not to bend, twist,
kink or damage flexible hydraulic lines.
4.
Remove hex head screws and flange locknuts
securing each lift arm to the castor arm and separate
from the arm (Fig. 63).
5.
Roll the cutting unit away from the traction unit.
6.
To re-install cutting unit, assemble in reverse
order.
Outboard Cutting Units -
1.
Position machine on level surface, lower cutting
unit to shop floor, engage parking brake, shut engine
off and remove key from ignition switch.
2.
Remove deck covers and relieve belt tension on all
belts (Fig. 66).
