Contaminated, sluggish or seized up guide elements
Here you will find useful basic information and valuable tips all about guide bolts on a floating-type calliper.
Important safety note
The following technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
In order for everything to function perfectly, both freedom and also ease of movement must be guaranteed.
Depending on the type of brake calliper, the guide bolts in the brake calliper carrier can be guided internally and sealed with dust protection sleeves or screwed onto the outside and mounted continuously in damping sleeves.
Contaminated, sluggish or seized up guide elements lead to a limited functioning of the brake calliper and can have the following effects:
In some cases, the wear pattern of the old removed brake linings may already indicate a possible cause.
In this video we show you repair and maintenance of the guide bolts on a floating-type calliper.
The following must be observed during all repair or maintenance work on the floating-type calliper:
However, damaged components must always be replaced.
Depending on the vehicle model and brake calliper type, various repair kits are on offer (Figure 2).
Before inserting the internal guide bolts, the sliding surfaces are to be coated thinly with a suitable silicone-based lubricant (Figure 3).
Unsuitable lubricants can lead to swelling of the rubber parts and subsequent faults on the wheel brake (Figure 4).
Before the brake is reassembled, the brake piston and the dust protection sleeve should also be checked for correct functioning and for any damage and replaced if necessary. Improper maintenance or repair work can lead to unpleasant complaints or cost-intensive consequential damage.
The brake system is a safety system. Repair work on the brake calliper should only be carried out by qualified specialist personnel.
In connection with this information, please also always observe the maintenance and repair instructions of each individual vehicle manufacturer!
Schematic representations, figures and descriptions serve only the purpose of explanation and presentation of the document texts and cannot be used as a basis for carrying out the repair.