R -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
122VU AIR COND/PACK TEMP/CTL SYS1/2/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/115VAC 21HH 23HH 24HH 22HH W22W21Y21Y20
R **ON A/C 401-499,
R R 122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC 53HH 55HH 56HH 54HH W22W21 Y21Y20
**ON A/C ALL
Subtask 21-63-42-010-050-A
C. Get Access
(1) Open the access panel (Ref. TASK 53-35-13-000-002),
(a) FOR 18HM 191BB.
(b) FOR 19HM 192FB.
4. Procedure_________
(Ref. Fig. 401/TASK 21-63-42-991-001)
Subtask 21-63-42-020-050
A. Removal of the Trim-Air Check Valve
(1) FOR 18HM
(a) Remove the nut (6), the washer (5) the bolt (13) and disconnect the bonding strap (3).
R Trim-Air Check Valve Figure 401/TASK 21-63-42-991-001- 13 (SHEET 1)
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R Trim-Air Check Valve Figure 401/TASK 21-63-42-991-001- 23 (SHEET 2)
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R Trim-Air Check Valve Figure 401/TASK 21-63-42-991-001- 33 (SHEET 3)
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(b)
Remove the nut (20), the washer (21), the bolt (23) and
disconnect the bonding strap (22).
(c)
Move the sleeve (25) as far to the clamp (24) as it will go. NOTE : Turn the sleeve when you move it.
____ This will help to prevent damage to the seals in the sleeve.
(d)
Remove the nuts (7), the washers (8) and the bolts (10).
(e)
Hold the duct (1) and remove the nuts (32), the washers (31) and the bolts (29).
(f)
Carefully remove the duct (1) from the sleeve (25) and the support rods (28) and (30).
NOTE : Turn the sleeve (25) when you remove the duct (1).
____ This will help to prevent damage to the seals in the sleeve When you remove the duct (1) you must take care that the trim-air check valve (9) does not fall and become damaged.
(g)
Remove the trim-air check valve (9) and the packings (4) and (12).
(h)
Put protective covers on the open ends of the ducts (1) and (14), the duct spigot (26) and the sleeve (25).
(2) FOR 19HM
(a)
Remove the nut (6), the washer (5) the bolt (13) and disconnect the bonding strap (3).
(b)
Remove the nut (20), the washer (21), the bolt (23) and
disconnect the bonding strap (22).
(c)
Move the sleeve (25) as far to the clamp (24) as it will go. NOTE : Turn the sleeve when you move it.
____ This will help to prevent damage to the seals in the sleeve.
(d)
Remove the nuts (7), the washers (8) and the bolts (10).
(e)
Hold the duct (2) and remove the nuts (32), the washers (31) and the bolts (29).
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(f) Carefully remove the duct (2) from the sleeve (25) and the support rods (28) and (30).
NOTE : Turn the sleeve (25) when you remove the duct (2).
____ This will help to prevent damage to the seals in the sleeve. When you remove the duct (2) you must take care that the trim-air check valve (9) does not fall and become damaged.
(g)
Remove the trim-air check valve (9) and the packings (4) and (12).
(h)
Put protective covers on the open ends of the ducts (2) and (14), the duct spigot (26) and the sleeve (25).
5. Close-up
________
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TASK 21-63-42-400-001
Installation of the Trim-Air Check Valves 18HM and 19HM
WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
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