JLG 4394RT Service Manual - Manual (Page 156)

SECTION 3 - CHASSIS, PLATFORM & SCISSOR ARMS
3-120 – JLG Lift – 3121249
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The fuel supply system is operating normally, if a failure of the control sole-
noids is suspected. Refer to Fuel Control System Diagnosis.
1. Install the test plug in the LPR secondary chamber.
2. If you were sent to this routine by another diagnostic chart, return to the
previous diagnostic procedure.
Is the action complete? - - System OK - -
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1. Disconnect all test equipment.
2. Install the primary and secondary test port plugs.
3. Start the engine.
4. Using SNOOP or equivalent, leak check the test port plugs.
Is the action complete?
- - System OK - -
Table 3-15. LPF Fuel System Diagnosis
STEP ACTION VALUE(S) YES NO