Maintenance; Bladeshaft V-Belt Tension - Husqvarna RS 7400 D Operator's Manual

9

mAinTenAnCe

Before performing any maintenance, ALWAYS
park the machine on a level surface with the
Engine OFF and the Engine Start Switch in
the "0" (OFF) position.
After each use: CleAn the machine.
lUBRiCATion:
enGine oil: Check daily. Change Engine Oil and Oil
Filter after every 100 HOURS of operation. See engine
manual for oil type to use. 15W40 CD, CE is generally
recommended. Capacity is 8.5 quarts (8 liters) with
filte (11D). Fill oil level to upper mark on dipstick.
lubricate every 50 hours:
• Front Wheel Bearing
• Pivot Pin at rear of raising frame.
HYDRAUliC SYSTem:
• Refer to Section 12 - "Hydraulic System"
enGine GeARBoX (10A):
• Change oil after every 500 hours of operation. Use
SAE 75W90 synthetic gear lubricant.
CoolinG SYSTem:
The engine cooling flui is antifreeze. The Radiator is
an Air/Water heat exchange.
• Clean the Radiator Air Filter Element every 50 hours
or when required, replace if damaged. Always keep
Radiator Air Filter Element in place.
• Check hoses for damage and looseness. Tighten or
replace as required.
AiR FilTeR:
• Clean the Air Filter Outer Element when the Restriction
Indicator Red Signal appears. Do noT clean the Inner
Safety Element!
To Change The Air Filter Element:
• Remove the Air Filter Housing by opening the two
(2) Air Filter Housing Clamps, and pulling the
housing off.
• Pull the Air Filter Outer Element out of the filter
housing and replace, or clean by using low pressure
compressed air [2.75 bar (40 psi - MAX)] from the
inside out. Do noT clean the filter element by tapping
it on the ground or other objects, this will damage the
filte element!
• Install Air Filter Outer Element by pushing it into
the housing.
• Install the Air Filter Housing and close the two (2) Air
Filter Housing Clamps.
38
The two (2) Air Filter Housing Clamps can NOT
be closed unless the Air Filter Outer Element is
properly installed.
• Replace the Inner Safety Element (6D) twice per year
or if it becomes damaged.
• Replace any damaged filter or gaskets.
• Check air hose and clamps for damage or looseness.
Tighten or replace as required.
FUel FilTeR:
• Replace In-Line Fuel Filter every 300 hours.
• Replace Spin-On Fuel Filter every 500 hours.
10

BlADeSHAFT V-BelT TenSion

Check drive V-belt tension.
The V-belts are properly tensioned at the factory but
after a few hours of operation they will strech and
become loose. Loose V-belts result in poor saw
performance and short belt life.
• Check the blade drive V-belt tension by plucking
the belt lika a string. The belt should give a long
tone rather than a dull sound.
To tension the belts.
Open the front cover. Loosen the two horizontal
•
locking bolts with the blade shaft wrench, raise the
gearbox and engine by using the belt tensioning
bolts. Turn both of these bolts clockwise until V-
belts are tight and check the belt by plucking it
again.