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Maintenance
Note: It is necessary to lightly touch the charge
pump cap with your hand to check the pump
temperature. If the cap is too hot to touch, turn
off engine. The pumps may be damaged if the
pump becomes too hot.
If either drive wheel still does not rotate continue
with step 4.
4. Thoroughly clean the area around each of the
charge pump housings.
5. To “prime” charge pump, loosen two hex socket
head capscrews (shown in Figure 21) 1 1/2 turns
only. Make sure engine is not running. Lift
the charge pump housing upward and wait for
a steady ow of oil to ow out from under the
housing. Retighten the capscrews. Do this for
both pumps.
Note: Hydraulic reservoir can be pressurized up
to 5 psi to speed this process.
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 the Hydraulic Oil Level
section.
7. Allow unit 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.
Wheel Hub Nut Torque
Specication
Service Interval: After the rst 100 hours
Every 500 hours thereafter
Torque the nut on the wheel motor tapered shaft to
175-225 ft-lb (237-305 N-m).
Note: Do Not use anti-seize compound on the
wheel hub.
Check Spark Arrester
(if equipped)
Service Interval: Every 50 hours
WARNING
Hot exhaust system components may ignite
gasoline vapors even after the engine is
stopped. Hot particles exhausted during
engine operation may ignite ammable
materials. Fire may result in personal injury
or property damage.
Do Not refuel or run engine unless spark
arrester is installed.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Wait for mufer to cool.
3. If any breaks in the screen or welds are observed,
replace arrester.
4. If plugging of the screen is observed, remove
arrester and shake loose particles out of the
arrester and clean screen with a wire brush (soak
in solvent if necessary). Reinstall arrester on
exhaust outlet.
Thread Locking Adhesives
Thread locking adhesives such as “Loctite 242”
or “Fel-Pro, Pro-Lock Nut Type” are used on the
following fasteners:
• Pump sheave setscrews.
• Sheave retaining bolt in end of engine crankshaft.
• Caster wheel spacer nuts.
Mobil HTS Grease (Or
Food-Grade Anti-seize)
Mobil HTS grease (or food-grade anti-seize) is used
in the following locations:
• Between the cutter housing spindle and bearings.
• Between the cutter housing spindle and sheave.
• Under top cutter housing bearing guard.
Copper-Based Anti-seize
Copper-based anti-seize is used in the following
locations:
• On threads of Blade Bolts. See Check Mower
Blades section.
• Between engine crankshaft and pump and blade
drive sheaves.
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