Table Of Contents - ABB Mechanism HMB-8 Instructions Manual

Contents
1. Introduction
1.1 Description
2 Hydraulic Elements
3 Principles of Operation
3.1 CLOSE Operation
3.2 OPEN Operation
3.3 Over-Pressure Relief Device
4 Mechanism Maintenance
4.1 Pre-Maintenance Procedures
4.1.1 Placing the Mechanism Out of Service
4.1.2 Equalizing the Pressure in the Mechanism
4.1.3 Manually Operating the Operating Mechanism 9
4.1.4 Slow Switching Operations
4.1.5 Deactivating the Close-Position Interlock
4.2 General Maintenance Practices
4.2.1 Cleanliness
4.2.2 Mechanism Seals
4.2.3 Hydraulic Oil and Service Life
4.2.4 Limits on Pump Motor Operation
4.3 General Maintenance Procedures
4.3.1 Checking the Hydraulic Oil Level
4.3.2 Draining the Hydraulic Oil
4.3.3 Replacing the Pump Element (including Check
Valve) and Filter
4.3.3.1 Replacing the Pump Element
4.3.4 Replacing the Open and Close Pilot Valves 11
4.3.5 Evacuating the Mechanism
4.3.6 Refilling the Mechanism with Oil
4.3.6.1 Topping Off a Mechanism with Hydraulic Oil
4.3.6.2 Refilling a Mechanism that Has Been Drained 12
4.3.7 Replacing the Pump Motor
4.3.8 Leak Checking the Hydraulic System
4.3.9 Spring Travel Limit Switch Settings
4.3.10 Checking the Pump Start Counter
5 Manual Operation
6 Adjusting the Opening Closing Velocities
7 Adjusting the Onboard Auxiliary Switches
8 Manually Charging the Operating Mechanism 16
9 Troubleshooting
Figures
Figure 1
6
HMB-8 Hydraulic Operating Mechanism
6
(cross-cut views)
6
Figure 1b
HMB-8 Hydraulic Operating Mechanism
7
(external views)
7
7 Figure 2
7 HMB-8 Mechanism - High and Low Pressure
Figure 3
7
HMB-8 Position OPEN
9
9 Figure 4
9 Mechanical Switch
Figure 5
9
Pump with Motor
9
Figure 6
9
Measurement of Spring Tension
9
9 Figure 7
9 Bottom Side of Working Piston
10
Figure 8
10
Pilot Valve Assembly
10
Figure 9
10
Low Pressure Interlock 51016
10 Figure 10
10 Auxiliary Switch Drive Arm
11
12
12
13
13
14
14
14
15
15
18
641P026-008
HMB-8 / HMB-11 Mechanism
Contents
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