107
Prior to going down a slope
1. Use engine brake and exhaust brake,
2. Do not overuse the service brakes.
3. Use special care not to increase the speed excessively.
Make sure that the engine does not overrun.
4. Check to be sure that the brakes can be applied properly.
On Tractor
●
Apply trailer brakes when going down a zigzag slope.
●
Even when the trailer brakes are operative, the service brakes are applied
to both the tractor and trailer.
106
●
Same ratio as the coolant in the radiator should be added.
●
Before going up a slope, shift down to prevent placing undue load on the
engine and drive line.
When going up a slope, maintain a vehicle speed near the maximum torque of
the engine.
●
Use care to prevent the engine from overrunning.
Overrunning often occurs when going down a slope or shifting down.
●
Engine overrunning occurs when the engine is made to turn beyond the
maximum speed by the tires. Undue load on the engine could cause severe
engine damage.
CAUTION:
Avoid skipping the next lower speed gear when shifting down, as overrunning
readily occurs.
OWNER
’
S MANUAL
JAC HEAVY DUTY TRUCK
