- detach housing 9 (pic. 2-62) pump from cover 8;
- install universal puller 3 (pic. 2-63) and compress the fan pulley hub;
- unscrew the locking screw 6 (fig.2-62), press bearing 7 together with impeller 1 towards the stuffing box;
- install a universal puller, compress the impeller and remove the stuffing box.
Pic. 2-62. Longitudinal section of the coolant pump:
1 - impeller;
2 - thrust ring;
3 - stuffing box;
4 - pulley hub;
5 - roller;
6 - bearing lock screw;
7 - bearing;
8 - cover;
9 - body.
Pic. 2-63. Pulley hub removal:
1 - pump housing cover;
2 - pulley hub;
3 - universal puller.
Control. Check the axial clearance in the bearing. This operation must be performed if significant pump noise is noted. The gap should not exceed 0.13 mm at a load of 49 N (5 kg s). With a larger clearance, replace the bearing assembly with the roller with new ones.
It is recommended to replace the pump seal and the gasket between the pump and the cylinder block with new ones during repairs.
Inspect the pump housing and cover for deformation or cracks.
Assembly. Assemble in the following order:
- press the oil seal into the housing cover using the mandrel 41.7853-4028;
- press a new bearing with a roller into the cover, aligning the seat of the lock screw with the hole in the housing cover, wrap and caulk the hole of the lock screw;
- press the hub of the fan pulley onto the roller using a technological rod with a diameter of 25 mm and a length of 20 mm;
- using a mandrel (pic. 2-64) press the impeller onto the roller; check size 0.9-1.3mm (pic. 2-65);
- install the gasket and connect the cover to the body (socket wrench 13).
Pic. 2-64. Mandrel sketch
Pic. 2-65. Assembled pump