Servicing The Air Cleaner And Crankcase Ventilation System; Servicing The Fuel Filter; Drive Belt Service; General - Hobart JET-EX 4 Operation And Maintenance Manual

OM-2049

3. Servicing the Air Cleaner and Crankcase Ventilation System

A. General
It is important that the air cleaner be cleaned and serviced regularly each 100 hours of engine opera-
tion. Service the air cleaner more often under severe dust conditions. Failure to service the cleaner
can cause damage to the cylinder walls and rings, excessive oil consumption, and excessive fuel con-
sumption. The recommended filter element for replacement is United Air Cleaner No. 250A13.
B. Clean and Service Air Cleaner
(1) Remove thumb nut and remove air cleaner assembly.
(2) Disassemble air cleaner and discard dry filter element.
(3) Wash all components with solvent and blow dry with compressed air.
(4) Replace air cleaner body on carburetor.
(5) Install a new filter element.
(6) Replace air filter cover.
(7) Reinstall thumb nut and tighten securely.
C. Clean Crankcase Ventilation System
Clean breather cap at each oil change (100 hours).
(1) Remove breather cap from the rocker cover and clean it in a petroleum solvent.
(2) Replace breather cap.

4. Servicing the Fuel Filter

The fuel filter is a disposable in-line type and is mounted on the intake manifold (1-1; 17, Figure 3) on the
left side of the engine. The recommended filter element for replacement is Ford No. C2RZ-9155-A, and
should be changed every 800 hours.
A. Remove inlet and outlet hose clamps.
B. Disconnect the hoses and discard the filter.
C. Install new filter by connecting the hose from the fuel pump to the inlet side and the hose from the
carburetor to the outlet side of the filter.
D. Position the hose clamps and tighten them.
E. Start the engine and check for leaks.

5. Drive Belt Service

Check all drive belts and adjust if necessary each 200 hours. Refer to Ford Maintenance and Operator's
Manual in Chapter 5 for proper procedures.
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May 20/89