Daily Prestarting Checks

RG9837-UN-12JAN99

Left Side Oil Filler Cap

RG9838-UN-05JAN99

Rocker Arm Cover Filler Cap

RG8028B-UN-15JAN99

Crosshatch On Oil Dipstick

A - Dipstick

B - Left Side Oil Filler Cap

C - Rocker Arm Filler Cap

D - Crosshatch On Oil Dipstick

Do the following BEFORE STARTING THE ENGINE for the first time each day:

IMPORTANT: DO NOT add makeup oil until the oil level is BELOW the add mark.

Depending on application, oil dipstick (A) and oil filler cap (B) may be located on either the left or the right side of engine. In addition, oil may be added at rocker arm filler cap (C).

1. Check engine oil level on dipstick (A). Add as required, using seasonal viscosity grade oil. (See DIESEL ENGINE OIL in Fuels, Lubricants, and Coolant Section for oil specifications.)

   IMPORTANT: DO NOT fill above the top mark on the dipstick. Oil levels anywhere within crosshatch (D) are considered in the acceptable operating range.

2. CAUTION:

   
   TS281-UN-15APR13

   High-Pressure Fluids

   
   RG9839-UN-05JAN99

   Engine Top Tank

   A - Engine Top Tank

   Explosive release of fluids from pressurized cooling system can cause serious burns.

   Only remove filler cap when engine is cold or when cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve pressure before removing completely.

   Check the coolant level in engine top tank (A) when engine is cold. Coolant level should be at bottom of filler neck. Fill with proper coolant solution if level is low. (See ADDING COOLANT in Service As Required Section.) Check overall cooling system for leaks.

   NOTE: Refer to your boat operator's manual for recommendations for non-John Deere supplied accessories.

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3. IMPORTANT: A restricted or clogged sea water strainer will result in hotter than normal (or overheated) engine coolant and marine gear oil temperatures.

   
   RG5993-UN-27JAN92

   Sea Water Strainer

   The sea water strainer should be checked daily and cleaned as required, depending upon the operating environment.

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4. 
   RG9874-UN-12FEB99

   Air Intake Restriction Gauge

   A - Air Intake Restriction Gauge

   If equipped with air intake restriction indicator gauge (A), check gauge (except 6068SFM75 / AFM75) to determine if air cleaner needs to be serviced. For 6068SFM75 and 6068AFM75 engines, reset button pops up when air cleaner needs to be serviced.

   IMPORTANT: Maximum air intake restriction is 625 mm (25 in. H₂O). A clogged air cleaner element will cause excessive intake restriction and a reduced air supply to the engine.

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5. Make a thorough inspection of the engine compartment. Look for oil or coolant leaks, worn drive belts, loose connections and trash build-up. Remove trash buildup and have repairs made as needed if leaks are found.

   NOTE: Wipe all fittings, caps, and plugs before performing any maintenance to reduce the chance of system contamination.

   Inspect:

   • Engine shields and guards for trash build-up.
   • Air intake system hoses and connections for cracks and loose clamps.
   • Alternator drive belt for cracks, breaks or other damage.
   • Water pump for coolant leaks.
   • Coolant system for leaks.
   
   

   NOTE: It is normal for a small amount of leakage to occur as the engine cools down and parts contract. Excessive coolant leakage may indicate the need to replace the water pump seal. Contact your engine distributor or servicing dealer for repairs.

6. Turn key switch to “ON” position and check instruments for proper operation. Turn key switch “OFF”.

7. Refer to manufacturer's literature for marine gear and generator set daily service recommendations.