Branson F42r - Defect Diagnosis and Management

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CHAPTER 2 ENGINE 3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
3. DEFECT DIAGNOSIS AND MANAGEMENT
TROUBLE CAUSE REPAIRING
Engine difcult to start
Starter switch but does
not pinion.
1) Lack of battery capacity
1) If discharged, charging or
replace.
2) If lack of the capacity
because of the cold
weather, raise slowly the
temperature, or charging,
replace.
2) Connection of battery cable is loosen,
broken, or corroded. (excessive resistance)
Correction
3) Failure of spline which gets in gear pinion of
the armature shaft.
Correct the spline.
4) Failure of the magnetic switch plunger. Or
coil disconnection and short.
Correction or replace
5) Key-switch circuit is malfunctioning Correction or replace
6) Starter brush failure.
Disassembly and clear, broken
components is replaced.
Pinion engages with ring
gear but does not rotate
starter.
1) Lack of battery capacity. Same the 1-1)
2) Disconnection of cable that connect the
battery and magnetic switch. Or tightening
failure of the connecting wire that connect
magnetic switch and terminal of motor.
Correction
3) Gearing failure of pinion and ring gear. Correct or replace the pinion
4) Starter failure. Correction or replace
5) Tightening failure of batteries code
connection area.
Re-tighten.
Pinion not engages with
ring gear and does rotate.
1) Starter installation failure. Re-installation.
2) Failure of plunger & dimensions adjustment Correction
3) Pinion sleeve spring failure. Replace
The pinion engages with
the ring gear and starter is
rotated. But engine does
not rotate.
1) Overrunning clutch failure. Replace
2) Engine internal failure. Repair
Engine starts but will not
keep running
1) There is not a fuel in the fuel tank. Fill the supply tank.
2) Air inhalation in the fuel system Air bleeding
3) Fuel element clogging. Clean or replace
4) Air inhalation in injection pump. Air bleeding
5) The electricity does not ow in the fuel cut
solenoid valve of injection pump.
Conrm the presence of
electricity from condition that
key-switch is “ON”. If necessary,
check the fuse or wire.
6) Loose or failure of fuel cut solenoid valve in
injection pump.
Re-tighten the solenoid valve,
check the operation sound
when turn On, Off the key-
switch. Replace the failed
solenoid.
7) Injection pump failure Correction or replace