Morehouse UCM - 5 Service, Inspection, Maintenance, & Lubrication; Tools; Service Inspection; Maintenance

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 32
Rev. 03/2024
5.1 Tools
Only those tools normally available in a repair shop are needed for inspecon and maintenance of the Univer-
sal Calibrang Machine.
5.2 Service Inspecon
Perform a roune service inspecon of the calibrang machine at regular intervals. The frequency of inspec-
on depends on how oen and under what circumstances the machine is used. During this inspecon, check
the equipment for rust, leaking hydraulic uid, and other visible signs of deterioraon or damage. In addion,
check the oil level in the pump reservoir, and examine the O-ring seals. Replace any O-ring that is split, cut, or
otherwise damaged. Aer an extended period of heavy service, it is recommended to disassemble and clean
the pump. Cleaning the pump consists of washing or blowing out the body, casng, and washing the parts.
Refer to secon 6 for disassembly instrucons.
5.3 Maintenance
Roune maintenance of the machine usually is limited to replacing O-ring seals in the pump assembly, adding
hydraulic uid (as recommended in secon 3) if required, removing rust, dirt, and corrosion from all assem-
blies, touching up paint damage, ghtening any nuts or set screws which have loosened, and re-leveling the
machine, if required.
The numbers in parentheses in this secon refer to items in Figure 25. If the pump and jack assembly fail to de-
velop or hold pressure, correcve maintenance may be necessary. If the hand lever is operated and the pump
fails to develop pressure, be sure the relief valve is closed and there is sucient uid in the reservoir. If failure
connues, one or both check valves (33 and 38) may leak. Replace both O-rings to be sure.
If the pump builds up pressure but the pressure drops, examine all joints for leakage. A very small amount of
leakage will result in a considerable loss of pressure. As the pressure drops, watch the hand lever. If it rises, the
discharge check valve (33) is leaking. Replace the O-ring (29). If the hand lever does not rise as the pressure
drops, then the relief valve is leaking. A foreign parcle may be lodged on the seat. However, it is more likely
that the O-ring (39) has failed and must be replaced. The outlet in the pump body is tapped with 9/16”-18 NF
threads and SAE ORB-6 (15). A rm joint will prevent leakage. If leakage develops, do not ghten the ng
excessively. Replace the O-ring seal.
5. Service, Inspecon, Maintenance, & Lubricaon
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