EATON
WSB11206 WCSB Tensioner / Brake with ORB Coolant Ports Installation, Operation and Maintenance Manual E-CLCL-II009-E
August 2015
27
WCSB tensioner / brake with ORB coolant ports
4.6.5 Carefully examine the seal surfaces in the cylinder or
mounting flange / cylinder. If the surfaces have worn
to point as indicated on Table 8, the cylinder must be
replaced. Small nicks or scratches must be sanded
smooth to prevent air leakage.
Note: If the WCSB tensioner / brake assembly was completely
removed and disassembled to replace seals, refer to Section 4.9
to assemble.
4.6.6 Lubricate the seal surfaces in the cylinder with
Molykote
®
55 O-ring lubricant and carefully slide the
cylinder onto the spring housing. Take special care to
avoid damaging the seal lips.
4.6.7 Attach the cylinder to the pressure plate with the
screws, washers and spacer tubes removed in
4.6.1. Use Loctite
®
Locquic
®
Primer Grade "T" to
clean and prepare the screw threads and install with
Loctite
®
#262. Using a crosswise pattern, torque the
screws to the value shown on Table 2.
Warning
Loctite
®
Primer "T" contains harmful vapors. Refer to
the product label for proper safety precautions.
Caution
Loctite
®
#262 must be shaken prior to application.
Caution
Loctite
®
#262 may irritate sensitive skin. Refer to the
product label for proper safety precautions.
4.6.8 If mounting flange / cylinder seals have been
replaced, re-assemble the WCSB tensioner / brake
assembly per Section 4.9.
4.6.9 Install air lines and air test the assembly for seal
leakage per the following:
Apply 120 psig (8.3 bar) to an open port in the
cylinder (19) to disengage the spring-set brake
and check for release cylinder leakage. Apply
120 psig (8.3 bar) to the larger of the two ports in the
mounting flange / cylinder (112) and check for large
cylinder seal leakage. Allow the smaller port in the
mounting flange / cylinder to remain open to check
for potential leakage from the large cylinder to the
small cylinder in the mounting flange / cylinder. Shut
off the air supply and check for pressure drop from
the cylinders. If air pressure does not drop below
100 psig (6.9 bar) within 10 minutes, the seals
have been properly installed.
Continue the test by releasing the air pressure in
the larger port in the mounting flange cylinder, and
applying 120 psig (8.3 bar) to the smaller of the two
ports in the mounting flange. The larger port should
remain open to atmosphere. Apply 120 psig (8.3 bar)
to the cylinder (19) to disengage the spring set brake.
Check for leakage from the small cylinder to the large
cylinder in the mounting flange/cylinder. Shut off
the air supply and check for pressure drop from the
cylinders. If air pressure does not drop below 100
psig (6.9 bar) within 10 minutes, the seals have been
properly installed.
4.7 Spring
Replacement
4.7.1 Remove the WCSB tensioner / brake assembly, and
disassemble per Section 4.3.
4.7.2 Match mark the cylinder (19), spring housing (16),
and pressure plate subassembly (13) to one another,
to ease reassembly.
4.7.3 With the cylinder (19) facing up, disassemble the
cylinder/spring housing subassembly by loosening
the hex head screws (20) ONE TURN AT A TIME,
following a crosswise sequence, until the spring
force is relieved. Remove the hex head screws
and washers.
Caution
Failure to loosen the screws (20) evenly and in small
increments as described may cause the screws or
cylinder to bind.
4.7.4 Lift and set aside the spring housing (16) and
cylinder (19) as a subassembly to expose the
springs. Note the locations of the springs and
spring retainers (53) refer to Table 17 for 24”,
Table 18 for 36”,and Table 19 for 48”if applicable for
reassembly purposes.
Spring arrangement for 24WCSB
Figure 18
Содержание Airflex WSB11206
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