ENGINE DIAGNOSTIC TEST PROCEDURES
Section 6
•
HIGH IDLE RPM (NO LOAD)
400 Series On-Highway
(with Robert Bosch MW Pumps)
FROM FORM NO. CGED-365
HIGH IDLE RPM (NO LOAD)*
6
THROTTLE IN OVERRIDE POSITION AND AT MAXIMUM (HIGH IDLE) STOP
INSTRUMENT
GUIDELINE DATA‚
1st CHECK
2nd CHECK
MASTER
TACHOMETER
*Engine must be at normal operating temperature.
p Refer to "Performance Data Guidelines", in this section.
1.
Assure that accelerator linkage is adjusted properly
so outer control lever tang (Figure 13a and b) is in
override position. (Refer to Operation 3 "Accelerator
Linkage", this Section.)
2.
With throttle control lever in override position and at
maximum (High Idle) stop, use master tachometer;
determine high idle speed.
3.
Engine speed on tachometer should be within
specifications, outlined in "PERFORMANCE
Figure 13a. MW Throttle Lever
(View w/Bellcrank Linkage)
DATA GUIDELINES", in this Section.
4.
Enter the observed RPM in the 1st check box.
IMPORTANT
THE HIGH IDLE SPEED IS SEALED.
RESOLVE AN INCORRECT HIGH IDLE
CONDITION BY FOLLOWING WARRANTY
PROCEDURES.
Figure 13b. MW Throttle Lever
(View Without Bellcrank)
CGES-240-4
Printed in United States of America
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