Air Intake System; Lubrication - Gravely Convertible 7.6 Service Manual

The importance of maintaining an air cleaner in proper
condition cannot be over-emphasized! Dirt induced through
improperly installed, improperly serviced for inadequate dry
type elements, wears out more engines than does long hours of
operation. Furthermore,

AIR INTAKE SYSTEM

Figure 1
Oil capacity is 5 U. S. pints. Use API classification SC or SD
oils.
Summer - SAE 30 or SAE IOW 30.
Winter - (32° F or below) SAE 10W or SAE 10W 30.
Maintain at oil level at full mark on dipstick. Be sure tractor is
level when checking oil.
Oil Changes
Change the oil after the initial eight hours of operation. Then
change the oil every 40 hours under normal conditions,
oftener under dusty conditions and/or periods of extended
operation.
Drain oil by removing the oil drain plug, the bottom bolt on the
L. H. axle housing.
Be sure oil drain washer is in place when replacing the bolt.
Oil Filter
Under normal conditions, change the oil filter every 80 hours,
however, under extremely dusty conditions and/or extended
operation under heavy load, change the oil filter every 40
hours.
The oil filter must be installed by hand. Install the filter
following the instructions printed on the filter.
Periodic oiling of all linkage pivot points aids operation.
operating with a clogged element causes a richer fuel mixture
which can lead to formation of harmful sludge, deposits.
Always cover carburetor or air horn when air cleaner is
removed for servicing.
Dry type air cleaner elements should be serviced only
when required. Need for air cleaner service is evident by a
sudden loss of power for no apparent reason.
To clean, remove element and tap lightly on a flat surface
to remove loose surface dirt. Replace element if dirt does not
drop off easily or if the element is damaged in any way. Also,
replace element if there is any evidence of dirt on the inside
surface of the element.
DO NOT wash dry elements in any liquid or attempt to
blow dirt off with air hose as this will puncture the filter
element.
Handle new element carefully - do not use if the gasket
surfaces are bent, twisted or damaged in any way. Use only
genuine Gravely elements. Use of other elements will void
warranty. Not only must the proper element be used but it must
be properly installed to prevent unfiltered air from entering the
engine.
Install the air cleaner assembly in this sequence on the air
cleaner mounting bracket:
1. Rubber gasket
2. Air cleaner mounting base
3. Element
4. Air cleaner cover
Be sure the element gasket surfaces fit tightly on the base
and cover. The wing nut should be finger tight.

LUBRICATION

5. Rubber sealing
washer
6. Flatwasher
7. Wing Nut
5