40
When priming for the first time put into the filler 23 g of
НИИСС
-1
sealing
powder, Specs. 38.10270-78.
After disassembly of any of cooling system’s connections add the powder, if
necessary.
Water level in the cooling system should be inspected
on cold engine. Fill
water in the cooling system of cold engine through the radiator filler with the plugs of
preheater’s filling pipe and and heater’s cook being open. At temperatures below 0
°
C open the heater’s cook upon warming the engine only and add water in the
radiator up to the filler’s upper edge. In cool season disconnect the connection hose
from the expansion tank and direct it downwards having fixed the clip under the bolt
fastening the fan housing. In warm season do not disconnect the hose from the tank.
To drain the coolant
from the cooling system place the truck flat, or inclined
forward, and open three cocks available on the heat exchanger, preheater pump unit
and water pump inlet branch (on the right-hand side as viewed in the truck travel’s
direction).
In doing so, the plugs of radiator’s filler and preheater’s filling pipe shall be open.
The estimated volume of the coolant not drained with the cab heater’s cook being
open amounts to 2 l.
If water was used in the cooling system then, when draining it, do the following:
-
upon draining water from the cooling system and starting preheating run the
pump unit for 10-15 sec to remove water from the pump in order to avoid freezing-
on of the impeller, then close turn off all three drain cooks after the water is drained
fully;
-
upon draining water from the cooling system do not plug the radiator filler
and preheater’s filling pipe because they may possibly freeze on.
Do not run engine upon draining the coolant to remove the remaining water
from the system. That can cause failure of rubber packing rings of cylinder liners,
falling out of valve seats, burning-through and distortion of block hands.
Power Unit Mounting
The power unit is mounted on four resilient supports: front, rear and two centre
supports — the right
-
hand and left
-
hand ones.
The front and centre supports are of bearing type. The rear support, a holding
one, is mounted in unloaded condition using adjusting plates 9 (Fig. 30). The
power unit is mounted on beams 3 and 11 with its front and rear supports, and
with its centre supports on the brackets, which are secured to the truck frame.
Brackets 2, 7, 12 serve as supports for the power unit. Front support bracket 12 is
secured to the engine block front cover, while centre support brackets 2 to the
flywheel housing, and rear support bracket 7 to the rear end face of the gearbox.
Cushions 1 of the left
-
hand and right
-
hand centre supports are interchangeable.
Also cushions 4 and shock absorbers 5 of the front and rear supports are
interchangeable.
0-1 mm clearance between cushion 4 and rear support bracket 7 should be
maintained to mount the rear support in unloaded condition.
For this purpose perform adjusting in the following sequence of operations:
1. Unscrew nuts 8 and undo bolts 10.
2. Remove adjusting plates 9.
