Maintenance
1.
Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2.
Carefully clean area around filter. It is important
that no dirt or contamination enter hydraulic
system.
3.
Place a catch pan under the hydro filter.
4.
Unscrew filter to remove and allow oil to drain
from filter head.
Important:
Before reinstalling new filter, fill
it with hydraulic oil and apply a thin coat of
oil on the surface of the rubber seal.
Turn filter clockwise until rubber seal contacts the
filter adapter, then tighten the filter an additional
2/3 to 3/4 turn.
5.
Fill reservoir as stated in
Check Hydraulic Oil
and Tank Level.
Hydro Oil
Service Interval
Mobil 1 15W50
After first 250 hours
*Every 250 hours/Yearly
thereafter
*May need more often under severe conditions.
6.
Loosen filter 1/2 turn and allow a small amount
of oil to leak from the oil filter (this allows air to
be purged from the oil filter and supply hose from
the hydraulic reservoir). Turn filter clockwise
until rubber seal contacts the filter adapter. Then
tighten the filter an additional 2/3 to 3/4 turn.
7.
Remove the catch pan and properly dispose of
hydro oil and filter according to local codes.
8.
Raise the rear of machine up and support with
jack stands (or equivalent support) just high
enough to allow drive wheels to turn freely.
9.
Start engine and move throttle control ahead to
full throttle position. Move the speed control
levers to the full speed and run for one minute.
Shut down the machine, allow the hydros to cool
and recheck oil level.
If either drive wheel does not rotate, they may
have lost their “prime”. Refer to
Hydraulic
System Air Purge
section.
10.
Remove the jack stands.
Note:
Do Not change hydraulic system oil (except
for what can be drained when changing filter), unless
it is felt the oil has been contaminated or been
extremely hot.
Changing oil unnecessarily could damage hydraulic
system by introducing contaminates into the system.
Hydraulic System Air Purge
Service Interval: As required
Air must be purged from the hydraulic system
when any hydraulic components, including oil
filter, are removed or any of the hydraulic lines are
disconnected.
1.
Stop engine and wait for all moving parts to stop.
Raise the rear of the machine up onto jack stands
high enough to raise the drive wheels off the
ground.
2.
Check oil level as stated in
Check Hydraulic Oil
Level
section.
3.
Start engine and move throttle control ahead to
full throttle position. Move the speed control
lever to the middle speed position and place the
drive levers in the “drive” position.
4.
Open the drive wheel release on each pump.
5.
With the machine running, stroke the drive levers
from forward to reverse several time, slowly.
Then, retighten the drive wheel release valves.
Note:
If either drive wheel does not rotate, it
is possible to assist the purging of the charge
pump by carefully rotating the tire in the forward
position.
6.
If either drive wheel still does not rotate, stop
and repeat steps 4 and 5 above for the respective
pump. If wheels rotate slowly, the system may
prime after additional running. Check oil level as
stated in
Check Hydraulic Oil and Tank Level
section.
7.
Allow the machine to run several minutes after
the charge pumps are “primed” with drive system
in the full speed position. Check oil level as stated
in
Check the Hydraulic Oil Level
section.
8.
Check hydro drive linkage adjustment as stated in
Hydro Drive Linkage Adjustment
section in
Adjustments.
Check Tire Pressures
Service Interval: Every 50 hours
1.
Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
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