Gravely Pro-Walk Hydro 36HR PS Owner's/Operator's Manual page 36

Removing and Installing Mower Deck
Drive Belt
(988153, 156)
1. Park unit safely. (See PARKING on
page 20.)
2. Remove mower deck center belt cover.
3. Loosen nyloc hex nut (A) on top of idler
pulley (B) until belt will fit between pulley
and belt guide. The hex nut does not
need to be completely removed.
(Figure 33)
4. Loosen the jam nut (C) and loosen the
threaded rod until all spring (D) tension
is removed from the belt (E).
988153, 156
B
D
Figure 33
C
5. Remove mower deck drive belt and
discard.
6. Install new mower deck drive belt. See
Figure 33 for belt routing.
7. Tighten nyloc hex nut on top of pulley.
8. Tighten the adjustment nut on the
threaded rod until the proper spring
length is obtained (see Adjusting Deck
Belt Tension above). Tighten the jam
nut.
9. Replace mower deck center belt cover.
IMPORTANT: CHECK AND ADJUST
MOWER DECK DRIVE BELT AFTER 5
HOURS OF OPERATION.
(988154, 155, 157, 158, 159, 169)
1. Park unit safely. (See PARKING on
page 20.)
2. Remove mower deck center belt cover.
3. Loosen nyloc hex nut (A) on top of idler
pulley (B) until belt will fit between pulley
and belt guide. The hex nut does not
need to be completely removed.
(Figure 34)
4. Loosen the jam nut (C) and loosen the
threaded rod until all spring (D) tension
is removed from the belt (E).
A
E
IMPORTANT: CHECK AND ADJUST
MOWER DECK DRIVE BELT AFTER 5
HOURS OF OPERATION.
Adjusting Mower Deck Rake
NOTICE: The rear-to-front deck rake (angle)
is pre-set at the factory to 3/16 in. (4,8 mm)
higher at rear. Adjustment is only required if
parts are damaged or replaced. Deck rake
should be set at a 3" height of cut (HOC).
EN - 36
988154, 155, 157, 158, 159, 169
A
B
Figure 34
5. Remove mower deck drive belt and
discard.
6. Install new mower deck drive belt. See
Figure 34 for belt routing.
7. Tighten nyloc hex nut on top of pulley.
8. Tighten the adjustment nut on the
threaded rod until the proper spring
length is obtained (see Adjusting Deck
Belt Tension above). Tighten the jam
nut.
9. Replace mower deck center belt cover.
1. Park unit safely on a smooth, level
surface. (See PARKING on page 20.)
2. Remove hair pins from rear HOC rods
(A) and allow rear of deck to rest on anti-
scalp wheels.
3. Loosen the jam nut (B) on the trunnion
(C)
4. Remove hex flange nut, bolt and spacer
retaining HOC rod to deck.
5. Rotate trunnion in/out to
shorten/lengthen to achieve desired
deck height.
D
C
E