Electric Clutch Adjustment - Gravely 915034 - ZT1640 Owner's/Operator's Manual

5. Slowly release idler arm (item 6) until
tension is removed from idler spring
(item 1).
6. Remove PTO belt (item 3) from mower
deck and electric clutch (item 2).
Install (Figure 23)
NOTE: Do not install PTO belt (item 3) on left
mower deck pulley in step 1.
1. Install PTO belt (item 3) on electric clutch
(item 2) and mower deck.
2. Hook a puller into idler hole (item 4) and
pull idler arm (item 6) towards outside of
unit until PTO belt (item 3) can be routed
around left mower deck pulley.
3. Slowly release idler arm (item 6) until idler
pulley (item 5) rests firmly against PTO
belt (item 3).
4. Install belt covers (item 7) on mower
deck.
HYDROSTATIC BELT
REPLACEMENT
Remove (Figure 24)
1
9
8
2
7
1. Hydrostatic Belt
2. Hydrostatic
Transmission
Pulley
3. Electric Clutch
Connector
Figure 24
1. Remove PTO belt (see PTO Belt
Replacement on page 21).
2. Disconnect electric clutch connector
(item 3).
3. Remove bracket (item 5).
CAUTION: Use care when releasing
idler spring tension. Keep body parts
well away from idler when performing
this operation.
4. Disconnect idler spring (item 8) from
anchor bolt (item 9).
2
6
4. Pulley
5. Bracket
6. Electric Clutch
7. Idler
8. Idler Spring
9. Anchor Bolt
5. Remove hydrostatic belt (item 1) from
hydrostatic transmission pulleys (item 2),
pulley (item 4), electric clutch (item 6),
and idler (item 7).
Install (Figure 24)
1. Install hydrostatic belt (item 1) on idler
(item 7), electric clutch (item 6), pulley
(item 4), and hydrostatic transmission
pulleys (item 2).
2. Connect idler spring (item 8) to anchor
bolt (item 9).
3. Install bracket (item 5).
4. Connect electric clutch connector
(item 3).
5. Install PTO belt (see PTO Belt
Replacement on page 21).
ELECTRIC CLUTCH
ADJUSTMENT
WARNING: The mower blades MUST
STOP in 5 seconds or less when the
PTO is disengaged. Adjust or replace
electric clutch as required.
Test Mower Blade Stopping Time
(Figure 25)
3
1
4
5
To determine if the PTO stops the mower
blades within 5 seconds or less, measure the
OE0051
amount of time from when the PTO is shut off
to when the PTO belt stops rotating.
1. Lower mower deck to the lowest position.
2. Start engine and set throttle lever to
FAST.
3. Engage PTO to start mower blades.
4. Shut off PTO and simultaneously start
measuring the amount of time it takes for
the PTO belt to stop rotating.
• If the PTO belt stops rotating in 5
seconds or less, the electric clutch does
not need to be adjusted.
GB - 22
2
1. Electric Clutch
2. PTO Belt
Figure 25
OE0080