MTZ 952.2 - ELECTRIC EQUIPMENT; Storage battery has low charge; Starter fails to go on and turn the engine crankshaft

Troubleshooting
MTZ series 900
224
TROUBLE, EXTERNAL MANIFESTATION
REMEDY
The pump is not unloaded over the whole range of travel of the mounted attachment with load
when employing the position method of adjustment on reaching the specified position by the
mounted attachment
In case of minor displacements of the position han-
dle towards the lowering position, the pump is
shortly unloaded, on stopping the engine the leak-
proofness is normal
 Jamming or loss of sealing of the valve-
accelerator.
Remove the regulator-distributor; take away the by -
pass valve, disassemble and wash it.
If necessary, hammer the valve ball to this seat.
The pump is not unloaded as the position handle is
shifted towards the lowering position, on stopping
the engine the leak-proofness is normal
 Loss of sealing of the pressure setting valve.
Turn out on the top surface of the governor, remove
the springs, hammer the valve ball to this seat and
refit the parts.
ELECTRIC EQUIPMENT
Storage battery has low charge
Low level of controllable voltage.
Replace the generator voltage regulator.
Slipping of the generator driving belt.
Adjust the belt tension.
Increased transfer resistance between the storage bat -
tery terminals and wire lugs due to oxidation and loosen -
ing.
Clean the terminals, tighten and grease non-contact
parts with technical petroleum jelly. Tighten the fas -
t e ning of SB switch and the “ground” jumper.
Storage battery faulty.
Replace.
Storage battery “boils” and requires frequent adding of distilled water
High level of the controllable voltage.
Replace the generator voltage regulator.
Storage battery faulty.
Replace.
Starter fails to go on and turn the engine crankshaft
One of wire lugs at the storage battery is disconnected.
Tighten firmly the lugs on the SB terminals.
Heavy oxidation of wire lugs and terminals of the storage
battery.
Clean battery terminals and wire lugs, grease their non-
contact parts with technical petroleum jelly.
Engine start locking unit has operated or its switch is
faulty.
Set gearbox lever to leftmost or replace the switch.
Low starter starting moment due to storage battery dis -
charging.
Charge the battery to the norm.
Starter is faulty.
Remove the starter and have it repaired.
Generator does not develop full power
Slipping of generator driving belt.
Adjust.
Generator is faulty.
Remove the generator and have it repaired.
Generator noise
Slipping or excessive tension of fan belt.
Adjust.
Bearing wear.
Remove the generator and have it repaired.
The pilot lamp of the electric torch pre-heater
Break in the electric torch pre-heater circuit.
Eliminate.
The electric torch pre-heater circuit components are
faulty.
Replace.