20—420 Removal and installation of radiator
 
 

 
 
Installation dimensions for cooler — fan and fan — fan cover
 
 

 
 
Model
Fan distance "a"
for cooler approx. mm
Fan distance to fan cover approx. mm A
B
 
 

 
 
116.120
45
20
 
 

 
 
123
25
 
 

 
 
49
25
 
 

 
 
126.120
 
 

 
 
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Fan cover/fan
 
 

 
 
Installation dimensions for radiator with air-oil cooler
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Model
Installation dimension
 
 
"a" in mm
 
 
116.120
685 ± 1
 
 
123
 
 
673.5 ± 41)
 
 
126.120
 
 
l) Model 123.193 with air conditioning installation dimen­sion "a" 681 ±4 mm.
 
 

 
 
20.8-420/1 F 2
 
 

 
               

 

           
 

 
 
Tightening torques
Nm
 
 

 
 
Model 116
6-10
 
 

 
 
Drain plug radiator
 
 

 
 
Models 123, 126
1.5-21)
 
 

 
 
Lube oil hose to air-oil cooler
20-25
 
 

 
 
Transmission fluid hose to transmission fluid cooler
15-20
 
 

 
 
This torque can be obtained by means of a washer or a coin.
 
 

 
 
Special tools
 
 

 
 
Tester for cooling system
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001 589 48 21 00
 
 
Radiator cap with hose for leak tester
605 589 00 25 00
 
 
7 mm socket on flexible shaft for hose clamps with worm drive
123 589 12 09 00
 
 
Clamp
000 589 40 37 00
 
 

 
 
Removal
 
 

 
 
1    Drain coolant from radiator (20—010), loosen coolant hoses on radiator and pull off.
2    Disconnect transmission fluid and lube oil hoses and unscrew on radiator or air-oil cooler.
The open connections of oil hoses and connections on radiators and coolers can be closed with plastic plugs.
 
 

 
 
Model 116
3    Unscrew fan cover at top, pull out of holding clips at bottom and place over fan.
4   Push holder (arrow) in outward direction.
5   Lift out radiator together with air-oil cooler in upward direction.
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Model 116
 
 

 
 
20.8-420/2 F 2
 
 

 
           

 

       
 

 
 
Models 123 and 126
6 Pull out both holding clamps (2) in upward direc­tion.
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Model 123
 
 

 
 
Model 126
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7 Lift fan cover out of lower holders (arrow) and place behind fan.
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Model 123
 
 

 
 
Model 126
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20.8-420/3 F 2
 
 

 
       

 

       
 

 
 
8 Pull out both holding clamps (1) in upward direc­tion and lift out radiator together with air-oil cooler.
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Model 123
 
 

 
 
Model 126
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Installation
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9    Insert radiator with air-coil cooler.
Note: On model 116, for positioning righthand holder (driving direction), unscrew intake scoop (arrow) and screw on again after fastening radiator.
10    For additional installation proceed vice versa to removal.
Pay attention to distance of fan in relation to radia­tor and to fan cover.
11    Pressure-test cooling system with tester (approx. 1 bar gage pressure).
 
 

 
 
20.8-420/4 F 2