Mercedes 722.9 Oversized Lubrication Pressure

T R A N S M IS S ION PART S
Instructions
Mercedes 722.9
Oversized
Lubrication Pressure
Regulator Valve Kit
Upper
Valve Body
TOOL
88740-09K
•Valve
•Spring, Red
•Spring, Blue
R
EQ
Valve
D
Part No.
UIRE
Red
Spring
Selective
Selective
Blue
Spring
Tool Kit
Tool KIt
Part No.
F-88740-TL9
•Reamer
•Reamer Jig
•Guide Pin
NOTE: Sonnax “F-Tool” kits designed to
service a specific bore require the VB-FIX,
a self-aligning valve body reaming fixture.
More information and instructions can be
found online at www.sonnax.com.
1. Disassembly
a. Remove retaining plate and set aside for
reuse.
b. Remove OE spring and measure spring
free length.
NOTE: See chart to select
correct Sonnax spring.
c. After measuring and recording OE spring
free length, discard OE spring.
If OE Spring
Free Length
Use Sonnax
Selective Spring
Approx. 2.10"
Red Spring
Approx. 1.90"
Blue Sping
b. Install Sonnax valve, stem facing outward.
c. Install Sonnax blue spring OR red spring
(see chart). Ensure spring seats over valve
stem.
d. Reinstall OE retaining plate.
4. Final Testing
Vacuum testing at the port(s) indicated holds
the recommended minimum 18 in-Hg.
d. If OE spring is equipped with a rod in
the center, discard rod.
e. Remove and discard OE valve.
2. Bore Reaming
Ream lubrication pressure regulator bore (for
reaming instructions/reamer care, please visit
www.sonnax.com). Sonnax reaming tool kit
F-88740-TL9 and VB-FIX are required for
this operation.
3. Installation & Assembly
a. Ensure valve bore and body are thoroughly
cleaned and cleared of debris.
©2015 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com
18"-Hg
Upper
Valve Body
20
15
10
25
5
0
30
VACUUM
TEST
88740-09K-IN 08-17-15
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