Specifications

5. MAINTENANCE & INSPECTION 35
5. MAINTENANCE & INSPECTION
Conduct Periodic Inspection for Your Safety.
The functions of engine components will degenerate and engine performance will fall according to the use of
the engine. If countermeasures are not taken, you may encounter unexpected troubles while cruising at sea.
Consumption of fuel or lube oil may become excessive and exhaust gas and engine noise may increase.
These all shorten the life of the engine.
Daily and periodic inspection and servicing increase your safety at sea.
Inspect Before Starting.
Make it a daily rule to inspect before starting. →See [4.1 Inspection Before Starting]
Monitor the hour meter and conduct periodic inspections.
Keep a daily record of operation and maintenance. When the time for an inspection approaches, study the
relevant pages in the Operation Manual. Inspections should be made after every 50 hrs., 250hrs.(1yr.),
500hrs.(2yrs), 1000hus.(4yrs.) of use.
Use Genuine Yanmar Parts.
Be sure to use genuine Yanmar Parts for consumable and replacement parts. Use of other parts will reduce
engine performance and shorten the life of the engine.
Specialty technicians are ready to assist you with periodic inspections and maintenance.
Consult your Yanmar dealer or distributor in accordance with the service agreement.
Always Have Servicing Tools On Hand.
Keep servicing tools close to the machinery and ready for use in inspections.
Tightening Torque of Bolts & Nuts
It is important to tighten bolts and nuts properly to the correct tightening torque. Over-tightening damages the
threads of the bolts and nuts and ruins them. Insufficient tightening causes oil leakage from the installation
face or damage to parts. Important parts must be tightened with a torque wrench to the correct tightening
torque and in the right order.
Consult with your dealer or distributor if servicing requires the removal of parts.
The standard tightening torque for standard bolts & nuts is listed below.
NOTICE:
• Apply the following tightening torque to bolts having “7” on the head.
(JIS strength classification:7T)
• Tighten bolts with no “7” mark to 60% tightening torque.
• If the parts to be tightened are made from aluminum alloy, tighten the bolts to 80% tightening torque.
Bolt dia.
×
pitch mm M6
×
1.0 M8
×
12.5 M10
×
1.5 M12
×
1.75 M14
×
1.5 M16
×
1.5
Tightening torque N•m
(kgf
･
m)
10.8
±
1.0
(1.1
±
0.1)
25.5
±
2.9
(2.6
±
0.3)
49.0
±
4.9
(5.0
±
0.5)
88.3
±
9.8
(9.0
±
1.0)
137
±
9.8
(14.0
±
1.0)
226
±
9.8
(23.0
±
1.0)