Jacobsen 67991, Maintenance Manual

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5 TROUBLESHOOTING
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5 TROUBLESHOOTING
5.1 GENERAL ________________________________________________________________
The troubleshooting chart below lists basic problems that may occur during start-up and operation. For more detailed
information regarding the hydraulic and electrical systems contact your area Jacobsen Dealer.
Symptoms Possible Causes Action
Engine will not start. 1. Parking brake disengaged, traction
pedal not in Neutral or mow switch on. 1. Check interlock system and start-up procedure.
2. Glow plug has not timed out. 2. Reset ignition switch and allow glow plug to time out
before cranking engine.
3. Battery low on charge or defective. 3. Inspect condition of battery and battery connections.
4. Fuel tank empty or dirty. 4. Fill with fresh fuel. Change fuel filter. Bleed fuel
lines.
5. Fuse blown. 5. Replace fuse.
6. Relay defective. 6. Test and replace relay.
7. Neutral switch on traction pedal out of
adjustment or defective. 7. Adjust or replace switch.
8. Backlap switch is ON. 8. Turn backlap switch OFF.
Engine hard to start
or runs poorly. 1. Fuel level low, fuel or fuel filter dirty. 1. Fill with fresh fuel. Change fuel filter. Bleed fuel lines.
2. Air cleaner dirty. 2. Inspect and replace air filter.
3. Injectors, fuel pump. 3. Consult Engine Manual.
4. Engine problem. 4. Consult Engine Manual.
Engine stops. 1. Fuel tank empty. 1. Fill with fresh fuel and bleed fuel lines.
2. Interlocks not set before leaving
operator’s seat. 2. Engage parking brake and set mow switch to OFF.
Engine overheating. 1. Coolant level low. 1. Inspect and add coolant.
2. Air intake restricted. 2. Clean air intake at radiator.
3. Water pump belt broken or loose. 3. Tighten or replace belt.
Battery not holding
charge. 1. Loose or corroded battery terminals. 1. Inspect and clean terminals.
Battery light on. 2. Low electrolyte. 2. Refill to correct level.
3. Alternator belt loose or broken. 3. Tighten or replace belt
4. Charging system defective. 4. See engine manual.
Reels cut unevenly. 1. Bedknife-to-reel not adjusted correctly. 1. Inspect bedknife-to-reel adjustment.
2. Engine speed too low. 2. Check engine speed. Run engine at full throttle.
3. Mow speed not adjusted for turf
conditions. 3. Adjust mow speed for best cut.
4. Mow switch set in reverse. 4. Set for forward rotation.
5. Not enough rear roller pressure. 5. Move down pressure spring one hole towards
spring.
6. Front roller not following undulations
adequately. 6. Move down pressure spring one hole away from
spring.