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MODEL 44-50
VIBRATORY
DRIVER/EXTRACTOR
IV.
MAINTENANCE AND ADJUSTMENTS
H. DRAINING AND FILLING HYDRAULIC FLUID RESERVOIR
1. The Hydraulic reservoir is drained by removing a plug on the bottom of the reservoir.
2. The hydraulic reservoir is fi lled by the manual pump mounted on the back (engine
side) of the reservoir. All fl uid is pumped to the reservoir through the return fi lter (F2)
to insure no dirt enters the hydraulic system.
I.
CHANGING HYDRAULIC RETURN FILTER ELEMENTS
1. The two return fi lters are located on the hydraulic reservoir below the Control Panel.
2. To remove the return fi lter elements, remove the 4 hex head bolts from the housing
cover. The bypass valve assembly is bolted to the cover.
NOTE:
3. Remove and separate the two elements. Save the plastic element connector; The use
of J&M fi lter elements is strongly recommended. Always use support springs installed
inside of the elements. Remove and reuse the support springs from the old elements
if new springs are not supplied.
4. Clean fi lter housing interior and all component parts with a lint free rag.
5. Check cover seal for damage. Lubricate with multi-purpose grease.
6. Install two new elements on fi lter connector, slide element assembly into housing. Be
sure inner most element engages the tube in back of housing.
7. Replace cover with bypass valve assembly.
8. Repeat for second fi lter assembly.
9. With new return fi lter elements installed, start the power unit and run for approximately
three minutes. CHECK FOR LEAKS.
Approximately 1 gallon (3.8L) of hydraulic oil will be lost.
Failure to install support springs could result in element collapse
with subsequent damage to oil cooler and / or fi lter housing.
IV-8
OPERATING
INSTRUCTIONS
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