Lubricating System - Kubota WSM B2050 Workshop Manual

B2050, B2350, B2650, B3150, WSM

(2) Lubricating System

Valve Clearance 2 (CABIN Model)
IMPORTANT
• Valve clearance must be checked and adjusted when
engine is cold.
1. Remove the head cover and the glow plugs.
2. Check and adjust the valve clearance at the both valves
compression top dead center.
3. If the clearance is not within the factory specifications, adjust
with the adjusting screw.
• Firing order
3-cylinder: 1 → 2 → 3
4-cylinder: 1 → 3 → 4 → 2
• Check and adjust the valve clearance following the firing order
shown above.
Valve clearance Factory specification
(1) Adjusting Screw
(2) Lock Nut
Engine Oil Pressure
1. Remove the engine oil pressure switch, and set an oil pressure
tester.
2. Start the engine. After warming up, measure the oil pressure of
both idling and rated speeds.
3. If the oil pressure is less than the allowable limit, check the
following.
• Engine oil insufficient
• Oil pump damaged
• Oil strainer clogged
• Oil filter cartridge clogged
• Oil gallery clogged
• Excessive oil clearance
• Foreign matter in the relief valve
At idle
speed
Engine oil pressure
At rated
speed
(When reassembling)
• After checking the engine oil pressure, tighten the engine oil
pressure switch to the specified torque.
Tightening torque Oil pressure switch
1-S16
ENGINE
0.145 to 0.185 mm
0.0057 to 0.0073 in.
A: Valve Clearance
9Y1210982ENS0008US0
49 kPa
Allowable
2
0.5 kgf/cm
limit
7 psi
Factory 196 to 441 kPa
2
specifica- 2.0 to 4.5 kgf/cm
tion 36 to 64 psi
147 kPa
Allowable
2
1.5 kgf/cm
limit
27 psi
15 to 19 N·m
1.5 to 2.0 kgf·m
11 to 14 lbf·ft
9Y1210982ENS0009US0
KiSC issued 03, 2014 A