Product Manual

6: Maintenance ShopTek™ ST45, ST55, ST75 (U.S.A. & Mexico) Operation & Maintenance Manual
88292021-240 R01
34 Subject to EAR, ECCN EAR99 and related export control restrictions.
• Tighten all electrical connections.
• Assess the condition of the air filter element. If
it is excessively dirty, you may need to replace
it more frequently than the normal schedule
(every 2000 hours).
6.3.2 Service every 1000 operating hours
• Replace the fluid filter element(s).
• Inspect the air filter element and replace it if
necessary.
• Check the condition of the purge oil return line
filter and replace the filter if necessary.
• Tighten all electrical connections.
6.3.3 Service every 2000 operating hours
Perform all checks listed for every 1000 hours plus:
• Replace the air filter element.
• Grease the main motor bearings.
• Refer to the motor nameplate for grease
filling volume and filling locations.
6.3.4 Service every 2000 operating hours
(or six months)
• While the compressor is running, take a fluid
sample from the fluid sample valve for analysis.
Refer to Figure 6-1.
• Change the compressor fluid (Sullube
®
) if
the analysis indicates it is necessary.
6.3.5 Service every 4000 operating hours
(or semi-annually)
Perform all checks listed for every 1000 and 2000 hours plus:
• Replace the fluid/air separator element and
purge oil return line filter.
• Inspect the flexible drive coupling and service it
if necessary.
• Tighten all nuts, bolts, pipe fittings and electri-
cal connections.
• Check that all safety devices are operating cor-
rectly.
6.3.6 Service every 10,000 hours
Perform all checks listed for every 1000 and 2000 hours
plus:
• Change the compressor fluid (Sullube).
• If fluid analysis indicates you should change
the fluid more frequently, change the fluid
per the schedule recommended by the anal-
ysis.
6.3.7 Compressor fluid levels
Check the fluid level when the compressor is running.
The fluid level in the sight glass should normally be
between halfway and three-quarters of the way up the
sight glass.
• While the compressor is running, the fluid level
should never exceed the maximum fluid level
shown in Figure 6-2.
• Fluid should be added before the fluid level
drops below the minimum fluid level shown in
Figure 6-2.
WARNING
Hot fluid under pressure
Could cause burns or bodily injury.
When taking a fluid sample, wear gloves that are
heat- and liquid-resistant.
Figure 6-1: Fluid filter assembly
1. Fluid sample valve
2. Fluid filter