R&M Materials Handling MANUAL CHAIN HOISTS - Manual (Page 20)

RM SERIES II I&M MANUAL/EN/02.11.11
14/20
This document and the information contained herein, is the exclusive property of R&M Materials Handling, Inc., and represents a non-public, confidential and proprietary trade secret
that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials Handling, Inc.
Copyright © (2011) R&M Materials Handling, Inc. All rights reserved.
5 PREVENTATIVE MAINTENANCE
5.1 Maintenance Schedule
The maintenance and inspection intervals are based on normal duty under normal environmental conditions
(free from excessive dust, moisture, and corrosive fumes). If duty is heavier or environment more severe,
maintenance and inspection intervals should be shortened and more frequent.
Table 3. Maintenance Schedule
Interval Type of Check Inspection / Maintenance
1 month Visual examination Check the external condition of the unit
Check the condition of mechanism
Check the condition of the load chain and the attachments
Check the condition of the hooks
Check the condition of the hook safety latch
Check the condition of accessories
Clean the dust from the equipment
Check the greasing:
Lubricate the load chain with a brush (oil grade SAE 80)
Use oil to lubricate the heads of the hooks
6 month In-depth
examination Check the operation of the brake
Check the condition of the load wheel
Inspect the load chain for wear or distortion
Inspect the hooks for wear or distortion
12 month Maintenance Open the gear cover and grease the gears
Always keep the chain clean and free of debris. Clean as necessary with paraffin or diesel, drain and re-oil.
Do not clean the chain with thinners or degreasing agents under any circumstances.
5.2 Brake
5.2.1 Removing the Friction Disc
1. Remove the hand chain wheel cover.
2. Remove the cotter pin from the castle nut.
3. Remove the castle nut.
4. Remove the hand chain from the hand chain wheel.
5. Unscrew the hand chain wheel.
6. Remove the ratchet sub-assembly and the two friction discs.
Using a wire brush, clean:
• Threaded section of the main shaft
•
Brake plate
• Threaded bore of the chain wheel
5.2.2 Installing the Friction Disc
1. Install the first friction disc.
2. Slightly separate the two pawls and install the ratchet gear.
3. Ensure that both pawls are correctly positioned in the teeth of the ratchet gear.
4. Install the second friction disc.
5. Screw on the hand chain wheel, machined face towards the discs, until tight.
6. Screw on the castle nut until tight, back off the castle nut until the first slot available lines up with the
pinhole.
7. Insert the cotter pin and bend the ends away from each other.
8. Install the hand chain on the chain wheel.
9. Install the chain wheel cover.
10. Test the brake under load conditions.