The manual provides detailed instructions for repairing and replacing parts, including:
The front-surface mirror is highly sensitive. Clean it only when strictly necessary using absolute ethanol and an ultra-soft lens tissue to avoid scratching the reflective coating. Mechanical Cleaning and Lubrication
One of the most common issues with older BM 900 units is a stiff joystick or vertical slide. The service manual specifies exactly which lubricants to use (and which to avoid) to ensure smooth movement without damaging sensitive Swiss bearings.
Wipe the pad and metal rollers with a dry cloth. If sticky, use a small amount of petroleum ether to clear old grease. Apply a microscopic film of synthetic instrument lubricant to the tracks. haagstreit bm 900 service manual new
Once set up, using the BM 900 is intuitive. The instrument base allows single‑handed operation of the control lever for smooth movement in length (100 mm), side (100 mm), and height (30 mm).
: Cleaning the stage plate with alcohol and applying a small amount of oil to ensure smooth joystick movement.
Misaligned projection lens or dirty optics. The manual provides detailed instructions for repairing and
If moving the slit lamp on its base becomes difficult, this routine is indicated:
: Ensuring the slit opens and closes symmetrically.
: Step-by-step instructions for centering the slit and adjusting the focus of the binocular microscope to ensure "parfocality" (staying in focus when changing magnification). The service manual specifies exactly which lubricants to
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“It is recommended to protect the slit lamp with a dust cover in case it is not in use.” Haag-Streit offers small (HS-Part number 1001395) and large (HS-Part number 1001434) dust covers.