Maintenance
6. To drain engine coolant loop:
a. Remove the engine coolant loop (RC) cap.
b. Remove engine guards as shown. Let the
guardsrest on theenginetoaccessthedrain
valve.
Engine Coolant Loop DrainValve
Figure 43
c. Place a waste container under the drain
valve. Open the drain valve and drain
coolant.
d. To refill coolant loop, see
Refill Engine CoolantLoop, page 72.
e. Replace engine shrouds. Torque screws to
25 ft-lbs (33.8 N∙m)
Refill Proportioner Coolant LoopNote
Air needs to be purged from the proportioner
coolant loop when it is filled with new coolant
or when air enters the coolant system. It
takes about one full warm-upand cool-down
cycle to purge air from coolant.
To avoid burns, do not perform maintenance on
the coolant system until the coolant system has
reached ambient temperature.
Only use coolant solutions thatare compatible with
the system. See Coolant Specifications, page 72.
1. Before refilling coolant loop, perform steps 1–3
from Drain Coolant, page 69. Drain coolant loop
if necessary.
NOTICE
Do not refill with drained coolant. Use only
fresh, new coolantto avoid contaminants.
NOTICE
Do not use any “stop leak” additivesto prevent
plugged filters and small orifices.
NOTICE
Do not interchange the two caps between
the radiator and coolant bottle. The caps
have different pressure ratingsthat affect the
overflow.
2. Remove the caps from the metal proportioner
coolant loop fill bottle (HF) and expansion
bottle (HB). Fill theproportioner coolant loop fill
bottle (HF) to the top and add more coolant to
expansion bottle (HB) untilthe coolant is at the
coldfill line. SeeCoolant Specifications, page 72.
EB
HF
HB
RC
Coolant System Bottles
Figure 44