General Lubrication; Tensioning The Hydro Pump Belt - Gravely Promaster 100 Service Manual

4.3 GENERAL LUBRICATION

Apply a small amount of oil to the pivot points as
required for smooth and proper operation.
Apply high quality lithium base grease to the lube
fittings in each of the pump arm bushings and the front
frame pivot pin every 50 hours of operation. See
Figure 4.
Every eight hours of operation apply grease to the lube
fittings on: See Figure 4.
-each mower spindle (3)
-each wheel bearing (2)
-each caster pivot (2)
3
4
5
Figure 4
4.4 HYDRAULIC FLUID LEVEL
The hydraulic fluid level should be checked daily (more
often if leaks are observed).
1. Check hydraulic fluid level by looking at the
hydraulic fluid tank. Both sides of the tank should
be full to the top of the partition in the tank.
NOTE: Do not allow any dirt to get into the system.
Add hydraulic fluid to bring level up to the proper
height. Proper fluid is Mobil Super HP 20 W 50.
The hydraulic oil filter and hydraulic oil should be
changed after the first 50 hours. They both should be
changed every 500 hours thereafter.
2
1
PF2070
4 - 17
Be sure to stop engine before servicing any hydraulic
parts.
WARNING: HYDRAULIC FLUID UNDER
PRESSURE can penetrate skin and cause
severe burns that can result in death or
serious injury.
ALWAYS keep body and hands away from pin
holes or nozzles which eject hydraulic fluid
under pressure.
ALWAYS use paper or cardboard and not
hands to search for leaks.
KNOW that all hydraulic fluid connections are
tight and all hydraulic hoses and lines are in
good condition BEFORE applying pressure to
system.
Foreign fluid injected into skin must be
surgically removed within a few hours by a
doctor familiar with this form of injury or
gangrene may result.

4.5 TENSIONING THE HYDRO PUMP BELT

5
7
1. Jam Nut
2. Spring
3. Idler Rod
4. Hydro Pump Belt
1. Loosen the two nuts on the end of the idler rod.
2. Tighten the two nuts until the gap in the coils of the
spring is approximately .010 inches (.25 mm).
3. Lock the two nuts on the end of the idler rod.
1
2
3
4
8
6
5. Belt Tension
6. Mower Clutch Sheave
7. Mower Belt
8. Adjusting Nut
Figure 5 OF1130