Battery Replacement; Maintenance And Service - WEBTEC DHM 4 Series Manual

Battery replacement

Turn tester off.
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Loosen the two screws either end of the battery cover.
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Note: They are captive screws.
Carefully remove battery and disconnect.
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Connect new PP3 battery (See General Specification for details), place in tester and replace
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battery cover.
Tighten battery cover screws until the cover is flush with the panel.
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Note: Only replace with similar size and type of battery.
Replacement of burst discs
Calibration
Recommended period between calibrations is 12 months. Maximum period between
calibrations is 36 months. Unit accuracy may be affected by operating cycle, fluid condition
or extended periods between recalibrations. Testers can be specially calibrated at a different
viscosity to the standard, please contact sales for further information.
Low pressure gauge kit - comprises 63 mm Glycerine filled 40 bar (600 psi) gauge with
automatic cut-out valve, pressure test point and 300 mm (12") long micro bore hose. The test
point is fitted permanently into the tester block and the low pressure gauge can be connected
by hand without the need to stop the machine
Please consult sales office. Only use Webtec approved parts and accessories, using other
parts could cause permanent damage to the tester or comprise safety.
10

Maintenance and service

Disconnect the tester from the hydraulic
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circuit
Locate the new discs - the tester is shipped
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with spare discs located in the block
1 Screw the load valve fully shut - (clockwise)
2 Unscrew the safety disc holder from the valve
3 Remove the disc spacer and ruptured discs
from the valve and disc holder
4 Carefully shape the two new discs by
pressing them by hand between the disc
holder and spacer
Place the first disc inside the valve
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Replace the spacer
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Place the second disc on top of the spacer
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6 Screw in the disc holder, tighten to 54 Nm
(40 lb.ft)
Unscrew the load valve fully
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Re-connect the tester if required
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Accessories