Bosch Rexroth BS 2/R-300 - Finding a chain lock

10.4.5 Assembly instructions: Finding a chain lock with an operable chain
CAUTION!
 Observe DIN EN ISO 13857 when you remove or replace safety guards and/or
bypass protective equipment.
 Test runs with open paneling should only be performed by a person with
appropriate knowledge and experience using tip switches, and if there is no
possibility of interference from other switching devices.
On the side without motor, either remove the outer protective case half
(BS 2/C-100, ...-250, BS 2/R-300, ...-700, BS 4/R-300, ...-700) or remove the side
cover plate (BS 2/C-H, BS 2/R-H, BS 2/R-V+ 1200).
5. Start the belt section with the jog switch until the chain lock appears on the
chain tensioner.
You recognize the chain lock:
– of the fl at top chain by the gray fl at chain with hole

1
).
– of the accumulation roller chain by the galvanized tab 
2
).
1
)
2
)
2
)
Flat top chain Accumulation roller chain Accumulation roller chain Vplus
Fig. 28: Chain lock
48/84 Maintenance and repair
Bosch Rexroth AG, MIT: BS 2/C-…, BS 2/R-…, 3 842 563 834/2022-08