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Maintenance
6. To drain engine coolant loop:
a. Remove the eng
ine coolant loop (RC) cap.
b. Remove engine
guards as shown. Let the
guards rest on
theenginetoaccessthedrain
valve.
Engine Coolant Loop Drain Valve
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 Coolant Loop, page 72.
e. Replace engine shrouds. Torque screws to
25 ft-lbs (33.8 N∙m)
Refill Proportioner Coolant Loop
Note
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-up and cool-down
cycle to purge air from coolant.
To
avoid burns, do not perform maintenance on
th
e coolant system until the coolant system has
re
ached ambient temperature.
Only use coolant solutions that are compatible with
the system. See Coolant Specifications, page 72.
1. Before refilli
ng coolant loop, perform steps 1–3
from Drain Coo
lant, page 69. Drain coolant loop
if necessary.
NOTICE
Do not refill with drained coolant. Use only
fresh, new coolant to avoid contaminants.
NOTICE
Do not use any “stop leak” additives to prevent
plugged filters and small orifices.
NOTICE
Do not inte
rchange the two caps between
the radiat
or and coolant bottle. The caps
have diff
erent pressure ratings that affect the
overflow.
2. Remove the caps from the metal proportioner
coolant loop fill bottle (HF) and expansion
bottle (HB). Fill the proportioner coolant loop fill
bottle (HF) to the top and add more coolant to
expansion bottle (HB) until the coolant is at the
cold fill line. See Coolant Specifications, page 72.
EB
HF
HB
RC
Coolant System Bottles
Figure 44
70 3A1705J