Lubricating System Checking And Adjustment; Engine Oil Pressure; Cooling System Checking And Adjustment; Fan Belt Tension - Nanni N4.40 Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
(2) Lubricating System
(3) Cooling System

Engine Oil Pressure

1. Remove the engine oil pressure switch, and set the oil pressure
tester (Code No. : 07916-32032). (Adaptor screw : PT 1/8)
2. Operate the engine for warming-up.
3. Measure the oil pressure at the idle speed and rated speed.
4. If the oil pressure is less than the allowable limit, do a check
below.
• Engine oil level
• Oil pump
• Oil strainer
• Oil filter cartridge
• Oil passage
• Oil clearance
• Relief valve
At idle
speed
Engine oil pressure
At rated
speed
(When reassembling)
• After you examine the oil pressure of the engine, tighten its oil
pressure switch to the specified torque.
Tightening torque Oil pressure switch

Fan Belt Tension

1. Push the belt halfway between the fan drive pulley and
alternator pulley at a specified force 98 N (10 kgf, 22 lbf) to
measure the deflection (A).
2. If the measurement is out of the factory specifications, loosen
the alternator mounting screws and adjust its position.
Deflection (A) Factory spec.
(A) Deflection
1-S25
ENGINE
More than
Factory 98 kPa
2
spec. 1.0 kgf/cm
14 psi
50 kPa
Allowable
2
0.5 kgf/cm
limit
7 psi
300 to 440 kPa
Factory
2
3.0 to 4.5 kgf/cm
spec.
43 to 64 psi
250 kPa
Allowable
2
2.5 kgf/cm
limit
36 psi
15 to 19 N·m
1.5 to 2.0 kgf·m
11 to 14 lbf·ft
M00000003ENS0019US1
7.0 to 9.0 mm
0.28 to 0.35 in.
M00000003GEG0016US1
KiSC issued 06, 2009 A