04-16-2025, 04:12 PM
I replaced the drive axle air bags on my '86 , the originals were the same as your newer coach . The bags were also plumbed in a Y configuration from
the " ping" tanks with 1" hoses . The replacement bags have 1/4 NPT inlets in one of the mounting studs in each bag . After consulting with Richard and reading posts
of others , I decided to bypass the ping tanks and delete all the large hoses . I ran 3/8 DOT air lines direct from the control valves to the bags , maintaining equal length
hoses between the Ys and bags . A simpler solution than all the adapters , and the small inlet nullifies the effect of the ping tanks in any case IMHO. We have only done about 1K miles since the replacement , but I can report no issues so far .
I sourced air bags from Fleet Pride .
Others may chime in with their experience .
the " ping" tanks with 1" hoses . The replacement bags have 1/4 NPT inlets in one of the mounting studs in each bag . After consulting with Richard and reading posts
of others , I decided to bypass the ping tanks and delete all the large hoses . I ran 3/8 DOT air lines direct from the control valves to the bags , maintaining equal length
hoses between the Ys and bags . A simpler solution than all the adapters , and the small inlet nullifies the effect of the ping tanks in any case IMHO. We have only done about 1K miles since the replacement , but I can report no issues so far .
I sourced air bags from Fleet Pride .
Others may chime in with their experience .
1986 #89
VIN 007
Detroit 8V92 TA 475 HP
Allison four speed
Chris and Sharon Hand