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HYDRAULIC SYSTEM
The hydraulic system on your FINN HydroSeeder
®
is designed to give trouble-free service, when
properly maintained. The most important areas of maintenance are the hydraulic oil and filtration.
The reservoir holds 6 gallons (23 L) of hydraulic oil. The hydraulic oil should be replaced per the
lubrication schedule or if the oil becomes milky or gives off a burnt odor. The hydraulic oil filter
must be replaced on schedule with a 5 absolute micron filter (FINN part number 023914). The
hydraulic system relief is factory-set at 2,250 psi (15,513 kPa).
At time of manufacture, this unit contains Finn Vulhydra hydraulic oil. The chart below illustrates
the operating temperature range of the Finn Vulhydra hydraulic oil as well as the closest ISO
equivalents.
NOTE:
The Finn Vulhydra hydraulic oil may be substituted for either of the two
ISO oils listed below. Please use the temperature chart to determine what
oil works best in your situation.
PUMP MAINTENANCE
(Reference Figure 7 for callouts mentioned in this section)
Pump maintenance to be done only while engine is not running and
battery cables are disconnected. Failure to comply could result in
death or serious injury.
A. FACTORY TOLERANCES
1. To check pump tolerances, loosen the two clamps on pump suction piping and remove
inlet elbow. Through the pump suction hole, insert a feeler gauge between the pump
impeller (3) and the pump suction cover (1). This measurement on a new pump is from
0.030
to
0.045 in. (0.762
to
1.14 mm).
Tightening of the bolts should be performed in a criss-cross pattern.
DO NOT TIGHTEN OVER 15 lb-ft (20 N•m). Overtightening will crack
the flange of the pump suction cover.
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