Operation Manual

BX25, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM
ENGINE
Checking Valve Clearance
• IMPORTANT
• Valve clearance
must be checked and adjusted when engine
is cold.
1. Remove the cylinder head cover and the glow plugs.
2. Align the "1TC" mark (1) on the flywheel and alignment mark (2)
on the rear end plate so that the No. 1 piston comes to the
compression top dead center.
3. Check the following valve clearance marked with "*~ using a
feeler gauge.
4. If the clearance is not within the factory specifications, adjust with
the adjusting screw.
5. Then tum the flywheel 6.28 rad (360 0), and align the "1TC" mark
(1)
on the flywheel and alignment mark (3) on the rear end plate
so that the No.1 piston comes to the overlap position.
6. Check the following valve clearance marked with ",,:,," using a
feeler gauge.
7. If the clearance is not within the factory specifications, adjust with
the adjusting screw.
~
Valve arrangement
Adjustable
cylinder
location of piston
Intake valve Exhaust valve
No.1
* *
No.2
-!~,
*
No.3
*
~J,~
H
*:When No.1 piston is at the compression top dead center position.
: When
No. 1 piston is at the overlap position.
EX IN
EX IN
EX IN
Intake
and exhaust
0.145 to 0.185 mm
Factory spec.
-+A
valve clearance (cold)
0.00571 to 0.00728 in.
3TAAAAB1 P037 A
• NOTE
• The sequence
of cylinder numbers is given as No.1, No.2
and No.3 starting from the gear case side.
•
After adjusting the valve clearance, secure the adjusting
screw
with the lock nut.
(1) "1TC" Mark A : Gear Case Side
(2) Alignment Mark
W10172470
1-S13