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d) Thoroughly clean the area around each of the charge pump housings.
FIGURE 9
CHARGE PUMP LOCATION
e) To “prime” charge pump, loosen two hex socket head capscrews (shown in
Figure 11) 1-1/2 turns only. Make sure engine is not running. Lift charge
pump housing upward and wait for a steady flow of oil to flow out from under
housing. Retighten capscrews. Do this for both pumps. Note: Hydraulic
reservoir can be pressurized to up to 5 psi to speed this process.
f) If either drive wheel still does not rotate, stop and repeat Steps (d) through
(e) above for the respective pump. If tires rotate slowly, the system may
prime after additional running. Check oil level as stated in Section 5.1.8.
g) 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 Section 5.1.8.
h) Check hydro drive linkage adjustment as stated in Section 5.2.6.
5.1.11 Check tire pressures.
Service Interval: Pneumatic (air-filled) Drive Tires- 40 hrs.
Semi-pneumatic Caster Tires – No maintenance
a) Stop engine and wait for all moving parts to stop. Remove ignition key or
spark plug wire(s). Check air pressure in drive tires; recommended tire
pressure is 12-16 psi.
b) Inflate tires to pressures stated above. Measure circumference of each drive
tire. Adjust tire pressures within the above range to try to make tire
circumferences match as closely as possible.
5.1.12 Inspect Belt wear.
Service Interval: 40 hrs.
a) Stop engine and wait for all moving parts to stop. Remove ignition key or
spark plug wire(s).
b) Remove deck support belt shield to check mower deck drive belt condition.
c) Look under engine deck to check the pump drive and clutching belt condition.
d) Check all idler arms to be sure they pivot freely. Disassemble, clean and
grease pivot bushings if necessary.
5.1.13 Inspect PTO Clutching Belt Tension.
Service Interval: Check every 2 hrs. for first 8 hrs. operation then check every
40 hrs. thereafter.
a) Stop engine and wait for all moving parts to stop.
CHARGE PUMP CA
P
LOOSEN 1-1/
2
TURNS ONLY