Mc Leod Piston Seal Replacement User Manual
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Step 8 Gently install new Quad Seal into seal groove on Upper Housing. See Figure 5. Lube with brake
fluid for ease of installation. Be careful not to roll the Quad Seal! Install new quad ring swivel fitting
seal into Upper Housing on each side. Push Swivel fitting into side of Upper Housing and install new
spring pins from top into housing. Gently tap spring pins into housing until flush with top of housing.
Use a small block of wood to drive the pin into the housing. This will prevent damage to housing if struck
by the hammer. Spring Pin will engage swivel fitting groove and hold it in place. Pull on fitting assembly
to be sure the pin engaged the fitting groove. Install second spring pin and gently tap in until flush with
housing. Repeat for second hose/fitting assembly.
Step 9 Install new metal clad oil seal at center of Lower Housing to the depth of the seal you removed.
Press or tap it in with the socket until it reaches the desired depth. Install new Quad Ring into groove on
OD of Lower Housing. See Figure 5 Lube with brake fluid for ease of installation. Be careful not to roll
the Quad Seal!
Step 10 Be certain the new O-ring is in Piston Groove.
Step 11 All parts should be ready to assemble at this time. Lube the Quad Ring on the Lower Housing
with brake fluid and lube the ID of the piston as well. Place piston over the Lower Housing and press it
down until the piston is seated on the lower housing.
Step 12 Lube the ID of the quad ring on the Upper Housing and the OD of the piston with DOT 3 or 4
brake fluid. Place the Upper Housing up-side down with the oval bolt hole at the 12 O’clock position. With
the lower housing and piston assembly facing down position the housing so the drain back relief is at the
12 o’clock position. Push the Lower Housing and piston into the Upper Housing until the two housings
make contact. Be certain the o-ring doesn’t come out of the Upper Housing o-ring groove.
Step 13 Install bearing onto top of piston and press until the bearing seats against the piston. It must be
flat and parallel with the top of the piston!
Step 14 Re-install bearing assembly onto front of transmission and proceed with installation of
transmission. Be certain the hose with the bleeder screw is at the top!!
Question ??? Contact McLeod Tech Line 714.630.2764
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