Mack Trucks — 5-101.bk

5-101.bk Page 7 Friday, March 17, 2006 11:05 AM [215 LD] COOLANT CONDITIONER ELEMENT Refer to Figure 4-8. 3. Place a suitable container below the coolant filter area to catch any spilled coolant. Refer to Figure 4-7. 4. Using a suitable filter wrench (J 29927 or equivalent), remove the coolant conditioner filter element (13). Discard element. 1. Cut the plastic tie wrap (1) securing coolant conditioner supply tube (2) to cylinder head manifold overflow line. 5. Remove coolant conditioner head assembly (2) from thermostat housing (5) and coolant manifold (9) by removing mounting capscrews (1). 2. Disconnect fittings (3) from both ends of the coolant conditioner supply tube. Remove tube (2).

6. Remove and discard O-ring (4). 1 2 7. Carefully remove and examine the check valve assembly (3). Examine check valve assembly by depressing the check ball. If it resists movement and does not return to its seat freely, the check valve assembly must be replaced. 3 3 Figure 4-7 — Coolant Conditioner Supply Tube Removal 200249a 1. Plastic tie wrap 2. Coolant conditioner supply tube 3. Fittings Page 4-7 200 ENGINE DISASSEMBLY