PERIODIC INSPECTION, MAINTENANCE, AND LUBRICATION
4-1. PERIODIC INSPECTION. Periodic inspection consists of
4-3. SERVICING FUEL FILTER. The engine fuel filter bowl
inspection and services to be performed daily, every 50 hours,
should be inspected frequently and cleaned if dirt or water are
and every 100 hours of Test Stand operation as outlined
in Table IV. The hourly time is obtained by noting the tach-
hourmeter (21, figure 3-1) located on the control panel.
Shutoff fuel valve at top side of filter.
4-2. MAINTENANCE. Maintenance procedures outlined in
b. Loosen knurled nut below bowl and swing wire bail to
Table IV are detailed in the following paragraphs.
c. Remove bowl and screen. Empty bowl and clean
screen and bowl thoroughly.
Table IV. Periodic Inspection and Service
Inspection and Service
1. Hydraulic reservoir
Check fluid level; refill as required.
2. Fuel Tank
Check level; refill as required.
3. Control Panel
Check that all controls move freely and that all handles are securely in place. Check that
instrument glasses are intact. Test indicators (5 and 10, figure 3-1) by pressing inward.
Indicators shall light when pressed. Replace lamp in indicator if required.
4. Housing interior
Check all wiring for breaks, worn insulation, and loose connections. Check all plumbing for loose
fittings and leaks.
Check oil level in crankcase.
Check electrolyte level.
Check tire pressure; inflate as necessary to 65 psi. Check operation of hand brake lever.
50 HOUR INSPECTION
1. Fuel System
Check for loose fittings that might cause fuel leakage. Check and clean fuel filter.
paragraph 4-3. Remove and clean strainer in fuel tank neck.
Drain and refill with fresh oil. See paragraph 4-20.
b. Oil filter
Clean and replace element. See paragraph 4-4.
c. Air Cleaner
Check and service air cleaner. See paragraph 4-5.
d. Spark Plugs
Check condition and gap. See paragraph 4-6.
e. Fan Belt
Inspect fan belt for frays and cracks; check belt tension.
Check specific gravity of electrolyte. Clean outer case and terminal connections.