Morehouse UCM - Prepare the Hand Pump for Use; Prepare the Jack Assembly for Use

Universal Calibrang Machine
(UCM) Manual
(PM-5201)
Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: (717) 843-0081
www.mhforce.com
Page 20
Rev. 3/2024
3.4 Prepare the Hand Pump for Use
Before connecng the hand pump assembly to the jack, check the supply of uid in the pump reservoir by
removing the ll plug (item 30 in Figure 25). The ll plug must be le open about two turns during operaon
to serve as a reservoir vent. If hydraulic uid must be added, then be sure to use petroleum-based an-wear
hydraulic uid with an ISO Viscosity Grade of 22 or 32. The following hydraulic uids are recommended, but
any equal hydraulic uid may also be used:
Arco .................................................... Dutro AW 32
Conoco ................................................. Super Hydraulic 32
Drydene Oil Co ........................................... Paradene 22 AW
Exxon................................................... .Nuto H 32
Gulf .................................................... Harmony 32 AW
Mobil ................................................... DTE 24
Texaco .................................................. Rando HD 32
Union................................................... Unax AW 150
When choosing a hydraulic uid, be certain it is equal to one of the above-listed recommendaons. Many for-
mulaons may lack certain addives or are formulated for special reasons, such as lower cost, high detergency,
leakage control, etc. Some of these uids can be used successfully, however, others may prompt malfuncons
and high rates of wear.
3.5 Prepare the Jack Assembly for Use
All hydraulic jack assemblies are furnished with a self-sealing hose coupling and are fully bled and checked at
the factory prior to shipment. However, if the hand pump and hydraulic jack seem rather “spongy” during use,
then there may be air in the system. If this occurs, then the system will need to be bled of the entrapped air.
The procedure for bleeding the entrapped air is outlined in Secon 6.2.