Removal and Replacement

Removal






1 On type 123.1, move engine hood to 90° position and latch left-hand locking lever (arrow).
2 Fully drain coolant.
3 Remove radiator.
4 On engine models 615 and 616, remove upper part of air filter. On engine model 617 in general and on engine models 615, 616 featuring injection pumps with mechanical governors, remove air cleaner.
5 On models with air-conditioner, detach A/C compressor together with bracket and connected pipes, and then put down on one side.

Remember to empty air-conditioner if A/C compressor is removed.






6 On models with level control, detach delivery oil pump together with connected lines. To do so, simply release bolts (arrows).






7 Draw oil out of power steering pump reservoir and disconnect hoses.
8 Unhook control linkage.
9 Disconnect all coolant, vacuum, oil, fuel and electric lines which lead to engine.
10 On uprated engines, remove longitudinal control shaft. To do so, unhook control rods, withdraw retaining ring (arrow) and force longitudinal control shaft backwards.
11 On types 115.117, 123.105/130/150 and 123.102/103/120/123/126/183 featuring automatic transmission, unscrew engine shock absorbers. On type 115.114, release engine shock absorbers from body work and force out toward engine.






Type 115.114
Engine shock absorber left (straight-ahead)






Type 115.114
Engine shock absorber right (straight-ahead)






Type 115.117






Type 123.102/103/120/123/125/126/183
featuring automatic transmissions






Type 123.105/130/150/190






Types 115.110/115


12 On types 115.110/115 and 123.1, unscrew engine stop.
On types 115.110/115, it is then necessary to unscrew self-locking nut (32) and withdraw adjusting screw.






Type 123.1

On type 123.1 (with the exception of types 123.105/130/150/190 featuring two engine shock absorbers), lift up retainer (30) and swivel away to one side. Unscrew adjusting screw (31).

13 Unscrew exhaust at exhaust manifold and at lateral support on transmission.






14 On types 115.110/115/117 featuring automatic transmissions, unscrew steering shock absorber on one side (arrow) and turn away.






Type 123.1

15 On type 123.1, unscrew engine bearer bolts at engine mount front, doing so from below. On type 115.1, work from above.
16 Unscrew propeller shaft at transmission.
17 Release all connections and shift rods at transmission.






Front suspension lug, type 123.1

18 Remove rear engine bearer with engine mount.
19 Attach engine hoist ropes to suspension lugs.

For engines in type 115.1, bolt one suspension lug to cylinder head at front. Use may be made of the suspension lug fitted to engines in type 123.1






Rear suspension lug, type 123.1

The rear suspension lug on engines in type 115.1 is located on the intermediate flange.

For engine 617 in type 115.1, wrap the rear rope around engine.






View showing engine 617 in type 115.1

20 Remove engine with transmission slanted to an angle of approx. 45°.

Installation

CAUTION: When installing a new engine as a result of bearing failure, flush Out the oil cooler, oil hoses, and clean oil filter housing.

21 Check engine mounts, engine shock absorbers, oil and fuel hoses, replace if necessary.
22 Prior to attaching manual transmission to flange, check deep-groove ball bearing in crankshaft as well as clutch throwout unit, replace if necessary.
23 Install and connect engine.
24 Attach and adjust propeller shaft.
25 Adjust engine stop.
26 Check all drain plugs for firm fit.
27 Fill with oils and coolant.
28 Pressure-test cooling system, using pressure tester.
Check coolant for antifreeze.
29 Clean air cleaner element, replacing if necessary.
30 Adjust idle speed.