TROUBLESHOOTING INSTRUCTIONS
Note: Provide valve serial number when ordering parts for either valve!
See pages 10 & 11 for parts Breakdowns
9
INSTRUCTIONS FOR SERVICING
LARGER TM VALVE
1. Shut off hot and cold supplies to this valve, loosen
LTR set screw, remove snap cap, screw and washer,
friction spring, remove pointer.
2. Remove, cover screws and cover, to which the
thermostat group is attached.
3. To clean port sleeve assembly (the thimble must
slide freely on the port sleeve): unscrew the check
nut as far as it will go, then screw the port sleeve nut
into the base. The port sleeve and thimble may then
be lifted out.
4. Clean with a non-corrosive cleaning solution.
DO
NOT USE ABRASIVES!
The port sleeve should be
reassembled in the valve with the shoulder to the left.
5. To clean thermostat group brush in a non-corrosive
cleaning solution.
6. When reassembling, make sure driving ball of
thermostat group engages the ball socket of the port
sleeve assembly.
INSTRUCTIONS FOR SERVICING
SMALLER TM 26 VALVE
1.
Loosen LTR set set screw.
2.
Remove pointer screw, and pointer.
3.
Turn off hot and cold supplies at screwdriver
checkstops. Remove M20-2C cover screws to
release cover and thermostatic control assembly.
4.
To remove bridge assembly, TM-28-1-8B, remove
pointer rod nut (MU-10B) and pull bridge assembly
off control rod.
5.
To clean submerge bridge assembly in clean water
or non-corrosive cleaning solution.
DO NOT USE
ABRASIVES!
Be certain thimble moves freely on
port sleeve. Note! Driving ball must engage slot in
thimble when reassembling.
6.
To clean thermostat group, loosen gland nut and
remove cover. Brush in a non-corrosive cleaning
solution.
7.
To disassemble bridge assembly, see drawing next
page
(remove
TM25-3A
holder
nuts
with
screwdriver in slots provided).
DRIVING
BALL
PACKING
SOCKET
BALL
FLANGE
THERMOSTAT
GROUP
POINTER
NUT
CHECK
THIMBLE
PORT
SLEEVE
PORT
SLEEVE
NUT
WEB
ADJUSTMENT
FINE
SCREW
1017
ASSE
COLD
HOT
(REST STOP AGAINST SCREW)
SET SCREW
LTR
STOP
POINTER
POINTER SCREW
PACKING & GASKETS
PORT SLEEVE/BRIDGE
ASSEMBLY
THERMOSTAT GROUP
CHECKSTOPS
1. Leak at stem
2. Leak between valve cover and base.
3. Valve delivers either all hot or all cold water,
or will not mix consistently.
4. After cleaning or replacing port sleeve/bridge
assembly, valve performance is not consistent.
5. Hot water by-pass into cold line (or cold into
hot).
6. Supplies cannot be shut off completely.
Supplies leak at checkstop bonnets.
Large Valve
Repair Kit 1/125Y
Repair Kit R/125
Repair Kit R/125 or TGM-
125
Repair Kit 2/50Y
Small Valve
Repair Kit 1/26(Packings &
Gaskets)
Repair Kit R/28(Rebuilding
Kit) or TM-28-1-8B Bridge
Assembly
Repair Kit R/28(Rebuilding
Kit) or TM-28-G2
Thermostat Group
Repair Kit 4/M20
(Checkstop Kit)
TM1520B ONLY
