J&M 220 Operating And Maintenance Manual - page 21
MODEL 220
HYDRAULIC
IMPACT HAMMER
II.
PREPARATION FOR OPERATION
H. CONNECTION OF HYDRAULIC HOSES
Connection of hoses at the Power Unit
The hammer is connected to the power unit by four hydraulic hoses.
(See Fig. 4)
CAUTION: The power unit must be shut down during connection of the hydraulic
hoses.
The hoses connect to the power unit with quick-disconnect couplings. The hose
couplings are arranged so that the hoses can only be connected in the correct
manner.
Clean the couplings with a lint-free cloth before making connections.
Make sure that the couplings are fully run up (tightened). They should be firmly
hand tight. If wrenches are used, be careful not to over-tighten. Pipe wrenches are
not recommended.
Connection of hoses at the Hammer
The Model 220 is normally shipped with the hoses attached to the hammer. If the
hoses have been shipped separately, they must be connected to the hammer.
Figure 4 shows the correct hose arrangement.
After the hoses have been connected, and tightened, to their respective fittings,
they must be secured in the hose clamps on the hose bracket (See hammer
assembly drawing in the PARTS LIST section). Be sure to leave enough slack in
the hoses, above the hose clamps, to permit 3-4” (76-101mm) of downward
movement by the hose clamp shock mounting elastomer.
II-8