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375 SE
800-00162
This single spool design cannot give precisely controlled flow to the primary circuit because of the effects
of varying conditions of flows and pressures. For example: If the primary circuit is operating at 1000 PSI and
the secondary at 100 PSI, the spool must be metering at “E”. However, if primary pressure is 100 PSI and
secondary is 1000 PSI, the spool must be metering at “D”. As the two systems approach the same pressure,
the probability of flow fluctuation increases because the spool may shaft between these two metering points.
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
The pump has a built-in relief valve in the primary circuit.
The pump has a built-in relief valve in the primary circuit.
The pump has a built-in relief valve in the primary circuit.
The pump has a built-in relief valve in the primary circuit.
The pump has a built-in relief valve in the primary circuit.
However, an external relief valve must be provided for
However, an external relief valve must be provided for
However, an external relief valve must be provided for
However, an external relief valve must be provided for
However, an external relief valve must be provided for
the secondary circuit to protect the pump.
the secondary circuit to protect the pump.
the secondary circuit to protect the pump.
the secondary circuit to protect the pump.
the secondary circuit to protect the pump.
SECTION IV - INSTALLATION AND OPERATING INSTRUCTIONS
SECTION IV - INSTALLATION AND OPERATING INSTRUCTIONS
SECTION IV - INSTALLATION AND OPERATING INSTRUCTIONS
SECTION IV - INSTALLATION AND OPERATING INSTRUCTIONS
SECTION IV - INSTALLATION AND OPERATING INSTRUCTIONS
A. DRIVE CONNECTIONS
A. DRIVE CONNECTIONS
A. DRIVE CONNECTIONS
A. DRIVE CONNECTIONS
A. DRIVE CONNECTIONS
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Pump shafts are designed to be installed in couplings,
Pump shafts are designed to be installed in couplings,
Pump shafts are designed to be installed in couplings,
Pump shafts are designed to be installed in couplings,
Pump shafts are designed to be installed in couplings,
pulleys, etc., with a slip fit or very light tap.
pulleys, etc., with a slip fit or very light tap.
pulleys, etc., with a slip fit or very light tap.
pulleys, etc., with a slip fit or very light tap.
pulleys, etc., with a slip fit or very light tap.
Pounding can injure the bearings.
Pounding can injure the bearings.
Pounding can injure the bearings.
Pounding can injure the bearings.
Pounding can injure the bearings.
1. Direct Mounting-A pilot on the pump mounting flange (Figure 6) assures correct mounting and shaft align
ment. Make sure the pilot is firmly seated in the accessory pad of the power source. Care should be
exercised in tightening the mounting screws to prevent misalignment.
If gaskets are used, they should be installed carefully and should lay flat. Shaft keys and couplings must
be properly seated to avoid slipping and possible shearing.
Figure 6
Figure 6
Figure 6
Figure 6
Figure 6
2. Indirect Drive-Chain, spur gear, or v-belt pulley drives may also be used with these pumps. Flat belt
drives are not recommended because of the possibility of slipping.
To prevent excessive side loads on pump bearings, it is important to check for correct alignment and
guard against excessive belt or chain tension.
For best results on indirect drive applications, use the largest permissible pulley diameter at the pump
and position it close as possible to the pump mounting face.
SERVO PUMP MAINTENANCE CONTINUED...
