PREVOST X3-45 Multiplex User Manual

Troubleshooting
38 Instructions on Design, Operation, Maintenance and Inspection
1.6.3 Checking the flow rate of the ZF pump
N
ote:
Specified values for flow rate, test pressure and test speed: see table below. Designations and
operation of tool [1] (ZF Servotest power steering tester 6..): see separate operating instructions
for ZF Servotest 6.. .
 Checking the controlled flow rate
Raise the engine speed until the pump flow rate remains constant despite a further increase in
speed (approx. 1300 r.p.m.)
The pump is now in the flow setting range.
Specified value: see spare parts list
 Checking the minimum flow rate
With the engine running at idling speed, progressively close the shut-off valve until the test pres-
sure specified for the pump type in question is built up.
Read the flow rate.
Make sure the engine speed/pump speed ratio is correct.
Pump Type
Test Speed
[r.p.m.]
Test Pressure
[bar]
Minimum Flow Rate
[dm
3/
min]
7672 500 50 5.0
7673 500 50 6.6
7674 500 50 7.8
7675 500 50 8.7
7677 500 50 12
7683 500 50 5.0
7684 500 50 6.1
7685 500 50 7.0
7686 500 50 9.6
7687 500 50 10.8
8601 1000 120 2.0
8604 350 50 4.0
8605 350 50 5.0
8607 350 50 5.0
Graphs see next page.

PREVOST X3-45 Multiplex Specifications

General

Length	45 ft
Width	102 in
Engine	Volvo D13
Horsepower	500 hp
GVWR	54, 000 lbs
Height	146 in
Sleeping Capacity	Varies based on floor plan
Water Capacity	Varies based on floor plan