Dawson HPH 1200, User Manual

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3.0 POWER PACK AND HAMMER OPERATION
3.1 Connecting the hydraulic hoses and control pendant
(The power pack must be turned off at this time to enable correct installation of the hoses)
There are four hydraulic hoses running between the power pack and the hammer, viz:
1. Pressure line (1" BSP) carries the main high pressure oil supply to the hammer.
2. Return line (1¼" BSP) returns low pressure oil from the hammer to the power
pack.
3.} Height adjusting lines (3/8" BSP) used to deliver
4.} Oil to the height adjusting ram, as required.
The pressure/return hoses have the same specification. However, the return hose ends have larger
fittings than the pressure hose to avoid possible confusion. Similarly, the height adjusting hoses
have different end types. The hoses should be left connected to the hammer at all times - this
reduces the likelihood of oil contamination and reduces leakage problems. The hoses should be
connected/ disconnected at the outlets of the power pack. All these connectors are of the
'quick-release' type. The hoses should be disconnected from the power pack when moving the
power pack around to avoid straining the connectors.
Make sure that the connectors are thoroughly cleaned when making a connection
Having connected the hoses, next fit the hand control pendant connector block to the multi-pin
outlet from the power pack. This is positioned below the instrumentation panel of the unit. Check
that a clean connection is made and that no water is present in either half of the connection. The
'power' switch on the controller should be turned off.
3.2 Checking the power pack before starting
Having connected the hydraulic hoses and hand control pendant, as described in section 3.1, next
check fluid levels on the power pack. Check:
a. engine oil level
b. diesel fuel level
c. hydraulic oil level, and fill if required
Notes:-
1. The diesel fuel and hydraulic oil tanks have sight gauges on the side of the tanks.
2. The power pack will not run if the hydraulic oil level is too low.
3. The hammer will not run if the hydraulic oil temperature is too low. The auto warm-up routine
must be used to pre-warm the oil. See section 3.3.1.