32 13 006 Bleeding power steering unit

WARNING: Observe SAFETY INSTRUCTIONS FOR HANDLING OIL .

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Using contaminated auxiliary materials to add fluid may introduce dirt particles into the oil reservoir and significantly reduce the service life of the hydraulic steering system. Do not use any filler funnels or similar!
The fill level may only be checked or adjusted when the engine is stopped! The oil temperature should be approx. 20°C here.
Ensure that the cap is fully screwed in prior to the fill level check.

NOTE: To avoid mix-ups when filling with hydraulic fluid, mark the fluid reservoirs or their caps with identification marks.

CHF Pentosin CHF11S

Fig 1: Identifying Reservoir Cap

Courtesy of BMW OF NORTH AMERICA, INC.

Thoroughly clean fluid reservoir and its immediate surroundings
Check and correct fill level
NOTE: The fill level can come to rest above the "MAX" mark when the engine is at normal operating temperature. This is dictated by the design as the marking on the oil dipstick is related to an oil temperature of 20°C. With the engine at normal operating temperature (approx. 50-60°C fluid temperature) adjust a fill height 10 mm above the "MAX" mark. Do not under any circumstances draw off the fluid to the "MAX" mark when the engine is at normal operating temperature.

Hydraulic fluid: refer to OPERATING FLUIDS
Start engine
Turn steering wheel left and right twice in each case up to full lock; if necessary, top up hydraulic fluid (e.g. if hydraulic system is completely drained)
Move steering wheel to straight-ahead position and turn off engine
Check and correct fluid level with engine stopped
Check hydraulic system for leak tightness