Refill Proportioner Coolant Loop - Graco 259079 Operation Manuals

Maintenance
5. To drain engine coolant loop:
a. Remove the engine coolant loop (RC) cap.
b. Remove engine guards as shown. Let the
guards rest on the engine to access the drain
valve.
Engine Coolant Loop Drain Valve
Figure 41
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 71.
e. Replace engine shrouds. Torque screws to
25 ft-lbs (33.8 N∙m)
70
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
the coolant system until the coolant system has
reached ambient temperature.
Only use coolant solutions that are compatible with
the system. See Coolant Specifications, page 71.
1. Before refilling coolant loop, perform steps 1–3
from Drain Coolant, page 69. Drain coolant loop
if necessary.
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 71.
HB
Coolant System Bottles
Figure 42
RC
HF
EB
3A1705E