Graco 25T991, Инструкция - Каталог запасных частей

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Maintenance
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Maintenance
NOTE : Before disassembly, make sure all spare parts
are available (new in an unopened package if
delivered), and other parts are thoroughly cleaned.
Suitable lubricant and thread locking compound should
also be available.
Inspect the SST Switch 3D Gun, material, and air lines
at least once every two weeks. Inspect for leakage and
other visible damage.
The following tables list recommended maintenance
procedures and frequencies for typical usage. The
maintenance is divided between mechanical and
electrical tasks. A typical application is the SST Switch
3D Gun mounted on a robot dispensing a moderately
abrasive sealant.
Maintenance Table
Preventive Maintenance
Typical wear parts in the SST Switch 3D Gun are the
rotary seals (508) inside the swivel housing, the needle
ball shutoff valves (418), and needle packing (411)
seals.
Due to the different materials that can be used in the
SST Switch 3D Gun, the frequency for preventative
maintenance has to be evaluated for each case of
application.
Based on average usage, Yearly Service Kit, 25U328
is provided for maintenance once a year and Service
Kit, 25T485 is provided for maintenance once every two
years (see page 38). Both of these kits are can be
purchased through Graco.
1. Dismount and disassemble the SST Switch 3D Gun.
See SST Switch 3D Gun Disassembly starting on
page17.
2. Reassemble the SST Switch 3D Gun. See Remove
the Material Inlet Block starting on page 17. Then
test all functions of the SST Switch 3D Gun, to make
sure that all parts are installed correctly.
To help prevent serious injury from pressurized fluid,
relieve pressure before cleaning, checking or
servicing the equipment.
Task Schedule
Check the applicator for material leakages by visual
inspection.
Daily
Listen carefully for air leakages. Daily
Clean the gun thoroughly. Daily
Inspect hoses and cables for excessive wear. Weekly
Check the leakage detection hole on the swivel
chamber and all connections.
Weekly
Check and tighten mounting connections Weekly
If possible, run a spray test on a spray test table. Weekly
Replace the needle packings.
If a normal PVC material and supply pressure are used,
replace after 1,000,000 cycles (1 cycle = open and close). If
normal LAASD material and supply pressure are used,
replace after 250,000 cycles.
Inspect needles for wear when replacing needle
packing Replace needles if needle coating has worn through and
base material of needle is exposed.
Change the sealing rings in the swivel chamber After 500,000 revolutions