Specifications

13
Hydraulic Connections
The power unit is equipped with Snaptite 78 series quick disconnect
couplings (or equivalent), 1 inch for the supply line and 1-1/4 inch for the
return line. These couplings contain check valves to prevent the loss of
hydraulic oil during connection and disconnection. Proper connection is
required to fully open the check valve. Connect the hoses as follows:
1. Wipe the connections clean as required to remove dirt and dust.
2. Connect the 1 inch pressure hose to the 1 inch coupling on the unit
by engaging the mating coupling halves and forcing the connectors
together while rotating the threaded sleeve on the hose connector. Full
thread engagement is necessary for the check valve to be fully open.
3. Using the same method as used for the 1 inch hose, connect the 1-
1/4 inch return hose.
NOTE: DO NOT attempt to connect hoses with the engine and pump
running. Be sure it is off and that no one can turn it on by mistake.
If either the pressure or return fittings are not fully tightened, the check
valve will cause a restriction in the flow. This can result in overheating the
fluid, poor tool operation and damage to equipment.
Hoses, connections and fittings should be chosen carefully so as not to cause
excessive restriction. Restriction in a hydraulic system equals pressure drop,
and pressure drop equals heat. Choose short, large inside diameter hoses
whenever possible over long, skinny ones.
Improper connection or restrictive circuits can cause a serious loss of power
and will generate heat uselessly.