All generations of minibuses have a side (sliding) door. Three rollers are responsible for the door operation, upper, middle and lower. They move along guide rails; for each generation of minibuses, the guides are different.

Structurally, a roller is a rolling bearing, in which the outer cage of the cage is made of plastic or metal. The plastic cover is used to reduce noise, but the life is reduced. The metal version of the outer cage of the separator is more durable. If the machine is a truck, the rollers are changed to metal ones, since there is no need to reduce the noise level of the sliding, but there is a need to increase the service life.

The usage of the roller guides

The reasons for the failure of the side door rollers, as a rule, are not many - natural wear and tear. The more often the door is used, the more the TOPRAN brand Roller Guide, sliding door wear out. Usually, there are also three side door guides - upper, middle and lower.

1. TRANSPORTER IV Bus (70B, 70C, 7DB, 7DK, 70J, 70K, 7DC, 7DJ)
2. TRANSPORTER / CARAVELLE IV Bus (70B, 70C, 7DB, 7DK, 70J, 70K
3. TRANSPORTER / MULTIVAN IV Bus (70B, 70C, 7DB, 7DK, 70J, 70K,
4. EUROVAN / CARAVELLE IV Bus (70B, 70C, 7DB, 7DK, 70J, 70K, 7D
5. TRANSPORTER T4 Bus (70B, 70C, 7DB, 7DK, 70J, 70K, 7DC, 7DJ)
6. TRANSPORTER / CARAVELLE Mk IV Bus (70B, 70C, 7DB, 7DK, 70J,
7. CARAVELLE IV Bus (70B, 70C, 7DB, 7DK, 70J, 70K, 7DC, 7DJ)
8. TRANSPORTER IV Van (70A, 70H, 7DA, 7DH)
9. EUROVAN IV Van (70A, 70H, 7DA, 7DH)
10. TRANSPORTER T4 Van (70A, 70H, 7DA, 7DH)
11. TRANSPORTER Mk IV Van (70A, 70H, 7DA, 7DH)
12. TRANSPORTER IV Platform/Chassis (70E, 70L, 70M, 7DE, 7DL, 7D
13. TRANSPORTER T4 Platform/Chassis (70E, 70L, 70M, 7DE, 7DL, 7D
14. TRANSPORTER Mk IV Platform/Chassis (70E, 70L, 70M, 7DE, 7DL,
15. See more in applications

The malfunction is manifested by a knock on the move, as well as the difficulty of opening and closing the door.