Murphy L129 User Manual
L-6572B page 1 of 2
L129 Series
■
Check Lube Level Without
Shutting Down
■
Use On Engines, Pumps,
And Compressors
■
Combination Indicating Gage with
Low and High Limit Switch
■
Float Operated
Description
The L129 Series Lube Level Swichgage
instrument is a combination lube level indicating gage and adjustable low and high limit
switches. It provides protection against low
oil level or high level caused by overfill or
fuel or water seepage into the crankcase.
A 6-3/4 inch (171 mm) deep sight gauge
allows you check the condition and level of
your oil without shutting down the equipment.
Fingertip adjustable limit contacts, thru
4-7/8 inch (122 mm) range, make it simple to
set high and low limit contacts. If the float
touches the high or low limit contact, a normally open circuit will be completed which can
activate alarms and/or shutdown the equipment.
There are two models in the L129 Series:
L129 and L129CK1. The L129 model is
designed for grounded, low voltage electrical
systems. It features a one-wire-to-ground electrical circuit. The L129CK1 was designed for
applications requiring a three-wire, above
ground electrical circuit. It features ungrounded contacts and a conduit hub to protect
electrical wiring.
Options are available for both models.
A flow restrictor plug is available that restricts
oil flow from the crankcase to the L129 Series
switch and vice versa. It is typically used on
applications where the engine is not stationary
such as marine and mobile equipment.
The L129 Series Lube Level SWICHGAGE
®
,
when properly installed and maintained, can
monitor and protect your engines and pumps
from improper lubrication level, which can
result in extensive damage.
Applications
The L129 Series is recommended for engines
and pumps with larger crankcase capacity.
Although designed primarily for stationary
engines, the L129 Series is often used in
mobile applications such as marine, rail, and
some large off-highway trucks.
Specifications
Case: Die Cast Aluminum.
Lens: Tempered Glass.
Maximum Working Pressure:
10 psi (68.9 kPa).
Process Connection: 1/2 NPT.
Float Material: Brass.
Contact Rating: 2 A @ 30 VAC/DC,
pilot duty.
Shipping Weight:
L129: 3 lb. (1.4 kg).
L129CK1: 3 lb. 9 oz. (1.6 kg).
Shipping Dimensions (both models):
12 x 4-1/2 x 4-3/4 in. (305 x 114 x 121 mm).
Warranty
A limited warranty on materials and workmanship
is given with this FW Murphy product. A copy of
the warranty may be viewed or printed by going to
www.fwmurphy.com/support/warranty.htm
L129
L129CK1
* Products covered by this bulletin comply with EMC Council
directive 89/336/EEC regarding electromagnetic compatibility
except as noted.
*
L-6572B
Revised 06-06
Catalog Section 15
Lube Level Swichgage
®
instrument
Wiring Diagrams
Dimensions
L129 L129CK1
L129
L129CK1
Contact Rating: 2 A @ 30 VAC/DC, pilot duty.
These diagrams are shown with the float in the “full” position.
HIGH (Black)
LOW (Red)
COM (White)
LOW
HIGH
L-6572B page 2 of 2
Repair Kits
Specify part number.
L129
15000888 Full Repair Kit (less castings and glass ass’y) for date
code T2 and later.
15000480 Bezel, Glass and Gasket Set for date code W7 and later
15000485 Glass and Gasket Set for all date codes
15050241 Restrictor plug for all date codes
L129CK1
15000480 Bezel, Glass and Gasket Set for date code W7 and later
15000485 Glass and Gasket Set for all date codes
15050241 Restrictor plug for all date codes
Printed in U.S.A. 8 5 0750
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our
specifications and designs at any time. MURPHY, the Murphy logo, and Swichgage®are registered and/or common
law trademarks of Murphy Industries, Inc. This document, including textual matter and illustrations, is copyright
protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc.
www.fwmurphy.com
918.317.4100 Email: sales@fwmurphy.com
3-3/16 in.
(81 mm)
Low Level
Adjust
-
-
-
-
2-31/64 in.
(63 mm)
1-1/2 in.
(38 mm)
2 in.
(51 mm)
1/2 NPT Closed Nipple
(2 supplied)
1/2 NPT Union
(1 supplied)
Shock Mount
(2 supplied)
Keps nut
(2 supplied)
High Level
High
Contact
8 in.
(203 mm)
Float
Low
Contact
Adjust
++
++
++
++
High Level
Adjust
High
Contact
9-55/64 in.
(250 mm)
Float
Low
Contact
+ +
+ +
+ +
+
Low Level
4-55/64 in.
(123 mm)
Adjust
+
1/2 NPT
Conduit
-
-
-
-
2-31/64 in.
(63 mm)
1-1/2 in.
(38 mm)
2 in.
(51 mm)
1/2 NPT Closed Nipple
(2 supplied)
1/2 NPT Union
(1 supplied)
Shock Mount
(2 supplied)
Keps nut
(2 supplied)
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