Checking The Cooling System; Changing The Coolant - Yamaha MTN850-A 2017 Service Manual

4. Check:
• Coolant level
TIP
Before checking the coolant level, wait a few
minutes until it settles.
EAS30812

CHECKING THE COOLING SYSTEM

1. Check:
• Radiator "1"
• Radiator inlet hose "2"
• Radiator outlet hose "3"
• Oil cooler "4"
• Oil cooler inlet hose "5"
• Oil cooler outlet hose "6"
• Water jacket joint "7"
• Water pump inlet hose "8"
Cracks/damage  Replace.
Refer to "RADIATOR" on page 6-1, "OIL
COOLER" on page 6-4, "THERMOSTAT" on
page 6-6 and "WATER PUMP" on page 6-8.
7
2
5
4
EAS30813

CHANGING THE COOLANT

1. Remove:
• Front side panel (right side)
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Radiator cap bolt "1"
• Radiator cap "2"
• Radiator cap stopper "3"
EWA13030
WARNING
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the en-
gine is hot. Scalding hot fluid and steam may
be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap counter-
clockwise toward the detent to allow any re-
sidual pressure to escape. When the hissing
sound has stopped, press down on the radi-
ator cap and turn it counterclockwise to re-
move.
2. Remove:
• Coolant reservoir bolt "1"
1
• Coolant reservoir cover "2"
• Coolant reservoir "3"
• Collars "4"
8
3
3. Remove:
• Coolant reservoir cap "1"
6
4. Drain:
• Coolant
3-27
PERIODIC MAINTENANCE
3
4
(from the coolant reservoir)
1
2
3
1
4
1
2
1