Service Manual

Reelmaster 7000−D Hydraulic SystemPage 5 − 39
Gear Pump (P4): 100 engine RPM = 0.24 GPM or
31 oz. (917 cc) of hydraulic fluid displaced per
minute
Gear Pump (P4): 100 engine RPM = 0.24 GPM or
31 oz. (917 cc) of hydraulic fluid displaced per
minute
NOTE: Engine−to−Pump ratio is 1:1. In other words, 1
engine RPM = 1 pump RPM.
4. The inlet and the outlet hoses must be properly con-
nected and not reversed (hydraulic tester with pressure
and flow capabilities) to prevent damage to the hydraulic
tester or components.
5. When using a hydraulic tester with pressure and flow
capabilities, open load valve completely in the hydraulic
tester to minimize the possibility of damaging compo-
nents.
6. Install fittings finger tight and far enough to make
sure that they are not cross−threaded before tightening
them with a wrench.
7. Position hydraulic tester hoses to prevent moving
machine parts from contacting and damaging the hoses
or tester.
8. Check fluid level in the hydraulic tank. After connect-
ing test equipment, make sure tank is full.
9. Check control linkages for improper adjustment,
binding, or broken parts.
Which Hydraulic Test Are Necessary?
Before beginning any hydraulic test, identify if the prob-
lem is related to the traction circuit, mow circuit, lift/lower
circuit, steering circuit or engine cooling fan circuit.
Once the faulty system has been identified, perform
tests that relate to that circuit.
1. If a traction circuit problem exists, consider perform-
ing one or more of the following tests: Traction Circuit
Charge Pressure, Traction Circuit Relief Pressure,
Traction Circuit Reducing Valve (PR) Pressure, Rear
Traction Circuit Relief Valve (RV) Pressure, Gear Pump
Flow and/or Piston (Traction) Pump Flow Tests.
IMPORTANT: Refer to Traction Circuit Component
Failure in the General Information section of this
chapter for information regarding the importance of
removing contamination from the traction circuit.
2. If a mow circuit problem exists, consider performing
one or more of the following tests: Mow Circuit Pressure,
Mow Circuit Relief Pressure, Cutting Unit Motor Case
Drain Leakage and/or Gear Pump P2 and P3 Flow
Tests.
3. If a lift/lower circuit problem exists, consider perform-
ing one or more of the following tests: Lift/Lower Circuit
Relief Pressure and/or Gear Pump P4 Flow Tests.
4. If a steering circuit problem exists, consider perform-
ing one or more of the following tests: Steering Circuit
Relief Pressure, Steering Cylinder Internal Leakage
and/or Gear Pump P4 Flow Tests.
5. If an engine cooling fan circuit problem exists, con-
sider performing one or more of the following tests:
Cooling Fan Circuit and/or Gear Pump P5 Flow Tests.
Hydraulic
System