Toro Reelmaster 7000-D Service Manual page 109

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.
Reelmaster 7000−D
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.
Page 5 − 39 Hydraulic System