Change Gearbox Oil; Check Gearbox Oil; Lubricate Grease Fittings - Exmark NAVIGATOR Operator's Manual

Maintenance
Belt Replacement and Pump Drive Belt
Replacement sections for belt replacement.

Change Gearbox Oil

Service Interval: After the first 50 hours
Every 2,000 hours
thereafter
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Place unit on a level surface.
3. Remove the gearbox and drive shaft assembly
from the mower deck. Retain hardware for re-use.
4. Remove the large oil drain plug on the front of
each of the three gearbox sections and drain oil
(Figure 20).
Figure 20
1. Small magnetic plugs
(front and back)
2. Large oil drain/fill plug
5. Remove small magnetic plugs and wipe away any
material accumulated on the plugs.
6. Apply a Teflon pipe sealant to all small magnetic
plugs and re-install into the gearbox.
7. Re-install the gearbox and drive shaft assembly
to the mower deck.
8. Fill gearbox with Mobil SHC (synthetic) 75W-90
gear lube oil until level with oil drain/fill plug.
Each of the gearbox sections must be filled
separately.
Note: Mower deck should remain level to the
ground when filling gearbox with oil. Do Not fill
gearbox with deck raised in the service position.
9. Apply a Teflon pipe sealant to the 3 large oil plugs
and re-install into the gearbox.
3. Small magnetic plug
(front only)

Check Gearbox Oil

Service Interval: Every 100 hours
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Place unit on a level surface.
3. Add oil as needed until level with oil drain plug;
see Change Gearbox Oil section.

Lubricate Grease Fittings

Note: See chart for service intervals.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Lubricate fittings with one to two pumps of
NLGI grade #2 multi-purpose gun grease.
Refer to the Lubrication Chart for fitting locations
and lubrication schedule.
Lubrication Chart
Fitting Initial
Locations Pumps
1. Caster *0
Pivot
2. PTO 1
Idler
3. Pump 1
Idler
4. Rear *0
Caster Hub
5. Drive 1
Shaft
6. Front 1
Caster
Wheel Hub
7. Deck 1
Flip-Up
8. Push 1
Arm Tubes
9. Front *0
Caster
Pivots
* See step 3 for special lubrication instructions on
the front and rear caster pivots and the Lubricate
Rear Caster Wheel Hubs section for special
lubrication instructions on the rear caster wheel
hubs.
36
Number of Service
Places Interval
3 *Yearly
1 Yearly
1 Yearly
1 *Yearly
3 40 Hours
2 8 Hours
4 100 Hours
2 100 Hours
2 *Yearly