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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 (d).
d) Thoroughly clean the area around each of the charge pump housings.
e) To “prime” charge pump, loosen two hex socket head capscrews (shown in
Figure 7) 1-1/2 turns only. Make sure engine is not running. Lift the
charge pump housing upward and wait for a steady flow of oil to flow 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.
f) If either drive wheel still does not rotate, stop and repeat steps (d) and (e)
above for the respective pump. If wheels rotate slowly, the system may
prime after additional running. Check oil level as stated in Section 5.1.9.
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
5.1.9.
h) Check hydro drive linkage adjustment as stated in Section 5.2.5.
5.1.12 Check tire pressures.
Service Interval: 40 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Check air
pressure in tires; recommended tire pressure is: rear, 12-14 psi; front
casters, 15-17 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.
Note: Front caster tires have permanent tire sealant installed.
5.1.13 Inspect Belt wear.
Service Interval: 40 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Remove the three mower deck belt shields to check mower primary and
secondary belt condition.
c) Look under engine deck to check the pump drive belt condition.
d) Check all idler arms to be sure they pivot freely.
5.1.14 Lubrication
a) Stop engine, wait for all moving parts to stop, and remove key.
b) Lubricate fittings with one to two pumps of NGLI grade #2 multi-purpose
gun grease.
Refer to the following chart for fitting locations and lubrication schedule.
LUBRICATION CHART
FITTING
LOCATIONS
INITIAL
PUMPS
No. of
PLACES
SERVICE
INTERVAL
1. Caster Wheel Bearings *0 2 *Yearly
2. Caster Pivots *0 2 *Yearly
3. Idler Pivots (Mower Deck) 1 2 40 hours
4. Idler Pivot (Pump Drive) 2 1 40 hours
5. Hydro Control Arm Support Bushings
2 2 40 hours