Ariens 992204 Folheto

SUBJECT: Improperly Assembled ZT-5400 Bypass

It has come to Hydro-Gear’s attention that the bypass on some ZT-5400s may be assembled 

incorrectly.  This can cause the transaxle to malfunction.  Inspect the order of the transaxles by-

pass components.  A correctly assembled bypass will have the seal, bypass rod, flat washer, wave 

washer and retaining ring installed in that order (see Figure 1).  For example there have been 

reports of the bypass assembled incorrectly with the flat washer between the seal and the bypass 

rod (see Figure 2). 

To correct this the retaining ring and wave washer will need to be removed and set aside.  In order 

to keep oil loss to a minimum the bypass rod only needs to be partially removed.  This will allow the 

technician to work the flat washer off the bypass rod.  Once the flat washer was been removed the 

bypass rod can then be installed back into the transaxle.  The flat washer, wave washer and retain-

ing ring can then be installed (see Figure 1).  Only a small amount of oil should be lost during this 

procedure.  If needed, top off the reservoir.

Date: 07/15/13

Retaining Ring

Wave Washer

Flat Washer

Bypass Rod

Seal

Figure 1

Retaining 

Ring

Wave Washer

Flat Washer

Bypass 

Rod

Seal

Figure 2 (Incorrect)