Exmark Viking Hydro Operator's Manual page 31

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 (34 kPa) 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 wheels 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 5.2.9.
5.1.11 Check tire pressures.
Service Interval: Pneumatic (air-filled) Drive Tires – 40 hrs.
a) Stop engine and wait for all moving parts to stop. Remove key or spark
plug wire(s). Check air pressure in drive tires; recommended tire
pressure is: 12 to 16 psi (83-110 kPa).
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 key or spark
plug wire(s).
b) Remove mower deck belt shield to check mower blade drive 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. Disassemble, clean and
grease pivot bushings if necessary.
5.1.13 Lubrication
Service Interval: Refer to Chart.
a) Stop engine and wait for all moving parts to stop. Remove key or spark
plug wire(s).
b) Lubricate fittings with one to two pumps of NGLI grade no.2 multi-purpose
gun grease.
Refer to the following chart for fitting locations and lubrication schedule.
FITTING
LOCATIONS
1. Caster Wheel Bearings
2. Caster Pivots
3. PTO Engagement Bellcrank
4. Pump Drive Idler Pivot
5. Pump Control Bearings
6. Mower Deck Idler Pivot
Semi-pneumatic Caster Tires – No Maintenance
GREASE LUBRICATION CHART
INITIAL
PUMPS
12
2
1
2
2
2
- 26 -
NO. of PLACES
32" 36" 48"
2 2 2
2 2 2
1 1 1
1 1 1
2 2 2
1 1 1
SERVICE
INTERVAL
Daily
Daily
Monthly
Weekly
Weekly
Weekly