Traction (Piston) Pump (P1) Flow Test (Using Tester With Flow Meter and Pressure
Gauge)
LIFT
CYLINDER
ORF1
CYL
SVR
R2
SVL
R1
G1
SVQ
PV
CONTROL
MANIFOLD
P
CHG
G2
T
FRONT
WHEEL
TESTER
’B’ PORT
(BOTTOM)
FORWARD
M1
’P’ PORT
’P’ PORT
’P’ PORT
P2 P1
M2
M3
’A’ PORT
(TOP)
Working Pressure
Low Pressure (Charge)
Return or Suction
Flow Direction
Figure 18
Procedure for Traction (Piston) Pump (P1) Flow
Test:
3. Read Precautions For Hydraulic Testing in this sec-
tion.
1.
perature by operating the machine for approximately 10
minutes.
Make sure hydraulic oil is at normal operating tem-
4. Remove pump control assembly from traction pump
(see Hydraulic (Traction/Charge) Pump Removal in the
Service and Repairs section of this chapter). Position
pump control assembly away from pump.
2.
Park machine ona levelsurface withthe coring head
fully raised. Make sure engine is off and parking brake
is disengaged. Secure coring head with service latch.
5. Make sure that hydraulic pump drive belt is adjusted
properly (see Operator’s Manual).
Hydraulic System
Page 4 -- 22 Rev. C
ProCore 648
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