engine YAMAHA WOLVERINE 2018 Owner's Guide

8-4
8
EBU37180Maintenance chartsEven if the vehicle isn’t driven for the stated mileage or engine hours, the month maintenance
intervals should still be followed. Items marked with an asterisk should be performed by a
Yamaha dealer as they require special tools, data and technical skills.EBU32032Emission control systemNO. ITEM ROUTINE INITIAL
EVERY
Whichev- er comes first month 1 3 6 6 12
km
(mi) 320
(200) 1200
(750) 2400
(1500) 2400
(1500) 4800
(3000)
hours 20 75 150 150 300
1 *Fuel line • Check fuel hose for cracks or damage.
• Replace if necessary. √√√
2 *Va l v e s • Check valve clearance and adjust if neces-
sary. Every 2500 km (1600 mi) for the first
7500 km (4800 mi).
Every 5000 km (3200 mi) thereafter.
3 Spark plug • Check condition.
• Adjust gap and clean.
• Replace if necessary. √√√√√
4 *Breather system • Check breather hose for cracks or damage.
• Replace if necessary.
√√√
UB3D7AE0.book Page 4 Tuesday, November 7, 2017 9:38 AM

8-6
8
EBU32114General maintenance and lubricationNO. ITEMROUTINE INITIAL
EVERY
Whichev- er comes first month 1 3 6 6 12
km
(mi) 320
(200) 1200
(750) 2400
(1500) 2400
(1500) 4800
(3000)
hours 20 75 150 150 300
1 *Cooling system • Check coolant leakage.
• Repair if necessary.
√√√√√
• Change coolant. Every 2 years
2 Air filter element •Clean.
• Replace if necessary. Every 20–40 hours (more often in
wet or dusty areas)
3Engine oil • Change (warm engine before draining). √√√√
4 Engine oil filter
cartridge • Replace.
√√√
5 Final gear oil • Check oil level.
√√√√√
• Change. √√
6 Differential gear
oil • Check oil level.
√√√√√
• Change. √√
7 *Front brake • Check operation/brake pad wear/fluid leak-
age.
• Correct if necessary. Replace pads if worn to the limit. √√√√√
UB3D7AE0.book Page 6 Tuesday, November 7, 2017 9:38 AM

8-8
8
EBU32331TIPSome maintenance items need more frequent serv ice if you drive in unusually wet, dusty, san-
dy or muddy areas, or at full throttle.17 *Stabilizer bushes • Check for cracks or other damage, and re-
place if necessary. √√√
18 *Rear knuckle up-
per and lower piv-
ots • Lubricate with lithium-soap-based grease.
√√√
19 *Drive shaft uni-
versal joint • Lubricate with lithium-soap-based grease.
√√√
20 *Engine mount • Check for cracks or damage.
• Check bolt tightness. √√√
21 *Front and rear
axle boots • Check for cracks or other damage, and re-
place if necessary. √√
22 *Fittings and fas-
teners • Check all chassis fittings and fasteners.
• Correct if necessary.
√√√√√
NO. ITEM
ROUTINE INITIAL
EVERY
Whichev- er comes first month 1 3 6 6 12
km
(mi) 320
(200) 1200
(750) 2400
(1500) 2400
(1500) 4800
(3000)
hours 20 75 150 150 300UB3D7AE0.book Page 8 Tuesday, November 7, 2017 9:38 AM

8-14
8
EBU33706Engine oil and oil filter cartridgeCheck the engine oil level before each opera-
tion. In addition, change the oil and the oil fil-
ter cartridge at the intervals specified in the
periodic maintenance chart.NOTICEECB00301 In order to prevent clutch slippage (since
the engine oil also lubricates the clutch),
do not mix any chemical additives. Do
not use oils with a diesel specification of
“CD” or oils of a higher quality than
specified. In addition, do not use oils la-
beled “ENERGY CONSERVING II” or
higher. 
Make sure that no foreign material en-
ters the crankcase.
To check the engine oil level
1. Park the vehicle on a level surface.
2. Check the engine oil level on a cold en-
gine.TIPIf the engine was started before checking the
oil level, be sure to warm up the engine suffi-
ciently, and then wait at least 10 minutes until
the oil settles for an accurate reading. 3. Remove the passenger seat cushion.(See page 4-15.)
4. Remove the rubber cover.
Recommended engine oil: See page 10-1.
Oil quantity: Oil change only:2.20 L (2.33 US qt, 1.94 Imp.qt)
When replacing the filter: 2.30 L (2.43 US qt, 2.02 Imp.qt)
UB3D7AE0.book Page 14 Tuesday, November 7, 2017 9:38 AM

8-15
8
5. Remove the engine oil dipstick and wipeit with a clean rag. 6. With the arrow mark pointing in the direc-
tion shown, insert the dipstick completely
into the oil filler tube and then remove it
again to check the oil level.1. Rubber cover
1
1. Engine oil dipstick
2. Maximum level mark
3. Minimum level mark
2
31
UB3D7AE0.book Page 15 Tuesday, November 7, 2017 9:38 AM

8-16
8
7. If the engine oil is at or below the mini-mum level mark, add oil a little at a time
so as not to overfill beyond the maximum
level mark. 8. Install the dipstick with the arrow pointing
in the direction shown.1. Oil filler tube
2. Arrow mark
2
1
1. Engine oil dipstick
2. Arrow mark
1
2
UB3D7AE0.book Page 16 Tuesday, November 7, 2017 9:38 AM

8-17
8
9. Install the rubber cover.
10. Install the passenger seat cushion.
To change the engine oil (and filter)
1. Park the vehicle on a level surface.
2. Start the engine, warm it up for several minutes, and then turn it off.
3. Remove the passenger seat cushion. (See page 4-15.)
4. Remove the rubber cover.
5. Remove the engine oil dipstick.
6. Place an oil pan under the engine to col- lect the used oil.
7. Remove the engine oil drain bolt. Discard the used gasket.
TIPPerform steps 8–10 when replacing the oil fil-
ter cartridge. 8. Remove the oil filter cartridge.1. Engine oil drain bolt
2. Gasket
1 2
UB3D7AE0.book Page 17 Tuesday, November 7, 2017 9:38 AM

8-18
8
TIPAn oil filter wrench is available from your
Yamaha dealer.
 Make sure the old O-ring is not stuck to the
crankcase. 9. Apply a light coat of clean engine oil to
the O-ring of the new oil filter cartridge.
TIPMake sure that the O-ring is properly seated. 10. Install the new oil filter cartridge with an oil filter wrench, and then tighten it to the
specified torque with a torque wrench.
1. Oil filter wrench
2. Oil filter cartridge
1
2
1. O-ringTightening torque:Oil filter cartridge:14 N·m (1.4 kgf·m, 10 lb·ft)
1
UB3D7AE0.book Page 18 Tuesday, November 7, 2017 9:38 AM

8-19
8
11. Install the engine oil drain bolt with a newgasket, and then tighten the bolt to the
specified torque.
12. Pour the specified amount of engine oil into the oil filler tube. 13. Install the dipstick with the arrow pointing
in the direction shown.1. Torque wrench
2. Oil filter wrenchTightening torque:Engine oil drain bolt:22 N·m (2.2 kgf·m, 16 lb·ft)
1
2
1. Engine oil dipstick
2. Arrow mark
1
2
UB3D7AE0.book Page 19 Tuesday, November 7, 2017 9:38 AM

8-20
8
TIPBe sure to wipe off spilled oil on any parts af-
ter the engine and exhaust system have
cooled down. 14. Start the engine, and then let it idle forseveral minutes while checking it for oil
leakage. If oil is leaking, immediately turn
the engine off and check for the cause.
15. Turn the engine off, wait at least 10 minu-
tes, and then check the oil level and cor-
rect it if necessary.
16. Install the rubber cover.
17. Install the passenger seat cushion.EBU36051Final gear oilCheck the oil level and change the final gear
oil at the intervals specified in the general
maintenance and lubrication chart.
NOTICEECB03590When checking or changing the final gear
oil, make sure that no foreign material en-
ters the final gear case. If necessary, clean
the final gear oil filler bolt and surrounding
area. Checking the final gear oil level 1. Park the vehicle on a level surface.
2. Remove the final gear oil filler bolt and its
gasket, and then check the oil level in the
final gear case. The oil level should be at
the brim of the filler hole.
Recommended oil:SAE 80 API GL-4 Hypoid gear oil
Oil quantity: 0.64 L (0.68 US qt, 0.56 Imp.qt)
UB3D7AE0.book Page 20 Tuesday, November 7, 2017 9:38 AM