Poor Acceleration (Insufficient Output) - Kubota 07-CR-E5 Manual

07-CR-E5,07-CR-TE5,07-CR-TIE5, DM

(7) Poor Acceleration (Insufficient Output)

Possible causes:
1. Fuel feed pump operation fault.
2. Large driving resistance due to problems in the machine itself that do not involve the engine
• Large resistance for actuation
• Tire air pressure
• Power transmission fault
• Brake drag
*Refer to the previous "List of malfunction causes by symptom" for the subsequent details.
3. Engine fault
• Low compression pressure.
• Engine internal fault
• Valve clearance fault
• Valve timing fault
• Engine oil viscosity fault
4. Control system
• Damage to the pulsar gear of the crankshaft position sensor
• Air gap of the crankshaft position sensor is large
• Accelerator position sensor misadjustment
• SCV operation fault
5. Intake system
• Air cleaner clogging
• Leak from the intake system parts
• Turbocharger operation fault
6. Fuel system
• Supply pump learning has not been performed
• Fuel quality
• Fuel pressure limiter fault
• Fuel line clogging, leak
7. CRS (including related parts)
• Output system (supply pump, injector and common rail)
• Input system (sensors) *A cause for larger injection quantity
• Engine ECU
8. Others
• Power transmission fault
• Large amount of drag (including the brakes, etc.)
• Defective CAN communication
1. Check the Fuel Feed Pump Operation
1. Turn the key switch ON and check that the fuel feed pump is
operating.
Service
Operates when the key switch is turned ON.
specification
OK Go to "2. Check the DTC".
NG Check in accordance with "6.[2] FUEL SYSTEM INSPECTION
PROCEDURE - 5. Check the Fuel Feed Pump". (Refer to page 1-S324)
(1) Fuel Feed Pump
1-S49
COMMON RAIL SYSTEM
9Y3200007CRS0070US0
9Y3200007CRS0027US0
KiSC issued 03, 2022 A