T-code Valid from serial number
403-414, 669-671, 716-718 713962-
Date Order number
2005-06-01 218920-040
13-  8 Service  Manual  REFLEX RR B/E, RR B/E CC © BT Europe AB
Mechanical drive gear unit – 2550
Checking/replacing the oil
13.4  Checking/replacing the oil
13.4.1 Checking/refilling the oil
• The oil level in the transmission should be checked after every 250 
operating hours.
• Check the oil level in the transmission by removing the oil-refill plug 
on the upper part of the transmission housing.
• Fill the oil right up to the opening to reach the correct level.  
Hypoid oil MP in the drive transmission.
• SAE 80W/90 for operations in normal temperature. 
SAE 75W for operations in cold stores, < -15
o
 C.
•Oil volume: 
Small gear: Approx.2.8 litres 
Large gear: Approx. 3.3 litres
13.4.2 Changing the Oil
Replace the oil in the transmission for the first time after 50-100 operat-
ing hours and then every 3000 operating hours.
• To drain the old oil, remove the lower transmission cowl completely.
• Replace the O-ring seal with every oil change. Make sure the new 
O-ring is not damaged when fitted.
• Fit the cover and tighten the bolts to a torque of 25 Nm. The bolts 
should be greased before assembly.
• Fill with oil as instructed in the chapter "Checking/refilling the oil."
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