Tightening Torque For Bolts And Nuts; Main Bolt And Nut - Yanmar 6LY3 series Service Manual

SERVICE STANDARDS

TIGHTENING TORQUE FOR BOLTS AND NUTS

Main Bolt and Nut

No. Name
New Bolt
Cylinder
1
Head Bolt
Used Bolt
2 Rod Bolt
3 Flywheel Retainer Bolt
New Bolt
Bearing
4
Cap Bolt
Used Bolt
Crankshaft Pulley Bolt
5
(FC300 pulley)
6 Timer Housing Bolt
7 Timer Gear Bolt
8 Idler Gear Shaft Bolt
9 Oil Pump Bolt
10 Turbocharger V-Band Bolt
11 Seawater Pump Gear Bolt
12 Fuel Nozzle Sleeve
13 Nozzle Fastening Bolt
Fuel Injection Pipe
14
Joint Nut
15 Fuel Return Pipe Joint Bolt
16 Oil Filter (Full Flow)
17 Oil Filter (Bypass)
Silencer Installation Hose
18
Band
14-10
Lubricating Oil
Thread Application
Diameter x Pitch (thread portion and
seat surface)
M14 x 1. 5 Coat with oil
M12 x 1.25 Coat with oil
M16 x 1. 5 Coat with oil
M15 x 1.5 Coat with oil
M16 x 1.5 Coat with oil
M8 x 1.25 No oil
M8 x 1.25 Coat with oil
M10 x 1.5 Coat with oil
M12 x 1.75 Coat with oil
Coat with Moly Coat
1/4-28 UNF
on thread portion
M14 x 1.5 Coat with oil
M13 x 1.5 No oil
M8 x 1.25 Coat with oil
M12 x 1.5 No oil
M6 x 1.0 No oil
Coat with oil on
1-12 UNF
O-ring
Coat with oil on
M25 x 1.5
O-ring
—
© 2007 Yanmar Marine International
Tightening Torque for Bolts and Nuts
1st: 118 N·m (12.0 kgf·m) (87lb-ft)
2nd: 177 N·m (18.0 kgf·m) (130 lb-ft)
3rd: 216-236 N·m (22.0-24.1 kgf·m) (159-174 lb-ft)
1st: 108 N·m (11.0 kgf·m) (80 lb-ft)
2nd: 167 N·m (17.0 kgf·m) (128 lb-ft)
3rd: 196-216 N·m (20.0-22.0 kgf·m) (145-159 lb-ft)
132.1-141.9 N·m (13.5-14.5 kgf·m) (97-105 lb-ft)
284-304 N·m (29.0-31.0 kgf·m) (209-224 lb-ft)
245-265 N·m (25.0-27.0 kgf·m) (181-195 lb-ft)
225-245 N·m (23.0-25.0 kgf·m) (166-181 lb-ft)
216-236 N·m (22.3-24.1 kgf·m) (159-174 lb-ft)
33.3-37.3N·m (3.4-3.8 kgf·m) (25-27 lb-ft)
34.8-38.8 N·m (3.5-4.0 kgf·m) (26-29 lb-ft)
62-66 N·m (6.3-6.7 kgf·m) (46-49 lb-ft)
98-118 N·m (10.0-12.0 kgf·m) (72-87 lb-ft)
5.4-7.4 N·m (0.55-0.75 kgf·m) (4-5 lb-ft)
73-83 N·m (7.4-8.5 kgf·m) (23-83 lb-ft)
52.9-62.7 N·m (5.4-6.4 kgf·m) (22-25 lb-ft)
29.4-33.4 N·m (3.0-3.4 kgf·m) (22-25 lb-ft)
22.5-26.5 N·m (2.3-2.7 kgf·m) (17-19 lb-ft)
7.0-9.0 N·m (0.7-0.9 kgf·m) (5-7 lb-ft)
Hand-tighten then turn an additional 3/4 of a turn.
Hand-tighten then turn an additional one turn.
— 2.5-3.5 N·m (0.25-0.36 kgf·m) (2-3 lb-ft)
6LY3 Service Manual
Torque