RUMBLE HOG RH7500, Operation Manual

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Section 4 - lubrication & maintenance
Weekly
• Check accumulator charge pressure.
• Trim accumulator= 150 psi (10.34 BAR)
• Cutter drum accumulator= 1500 psi (103.4 BAR)
• Eccentric accumulator = 350 psi (24.1 BAR)
WARNING
ACCUMULATORS ARE PRE-CHARGED AT EXTREMELY HIGH
PRESSURE THAT CAN CAUSE SERIOUS INJURY OR DEATH
IF SERVICED IMPROPERLY. ONLY TECHNICIANS CERTIFIED
IN HYDRAULIC ACCUMULATORS SHOULD PERFORM THIS
SERVICE.
200 Hours
• Change the low pressure filters in the return
line at the hydraulic oil reservoir. The filters
remove any debris that may enter the system
and should be changed every 200 hours or if
high pressure is indicated on the gauges with
the system activated and fluid flowing.
• Change the Zinga suction filter for the hydro -
static drive & eccentric pump circuit located
on the passenger side, below the hydraulic
fluid tank. It is a screen type filter that must
be changed every 200 hours or if the engine
begins to strain or stall when the hydrostatic
drive is engaged.
• Change the Donaldson charge filter for the
cutter pump circuit. It is the horizontal filter
located below the chassis near the OMSI Drive.
This filter should be changed every 200 hours
or if a drop in cutter pump charge pressure
is indicated on the display with the system
activated and fluid flowing.
• Inspect the fluid coolers and clean as neces -
sary. The coolers are critical in maintaining
acceptable fluid temperatures in the hydraulic
system and must be kept clean to maintain
efficiency.
600 Hours
• Drain hydraulic fluid and flush hydraulic tank.
1000 Hours
• Change the high pressure filters located be -
low the access plate on the center deck, just
forward of the blower. These filters should be
changed every 1000 hours or if the indictor at
each filter is near or into the red zone with the
hydraulic system activated and fluid flowing.
Zinga Suction Filter Below Hydraulic Reservoir
High Pressure Filters Below Deck Access Plate
Donaldson Filter Near OMSI Drive