Murphy Switch L129 Series User Manual

L-6572B  
Revised 06-06  
Lube Level Swichgage® instrument  
Catalog Section 15  
L129CK1  
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  
L129  
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.  
Contact Rating: 2 A @ 30 VAC/DC,  
Description  
pilot duty.  
The L129 Series Lube Level Swichgage  
instrument is a combination lube level indi-  
cating 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.  
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).  
®
The L129 Series Lube Level SWICHGAGE ,  
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 normal-  
ly 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 elec-  
trical circuit. The L129CK1 was designed for  
applications requiring a three-wire, above  
ground electrical circuit. It features unground-  
ed contacts and a conduit hub to protect  
electrical wiring.  
when properly installed and maintained, can  
monitor and protect your engines and pumps  
from improper lubrication level, which can  
result in extensive damage.  
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  
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.  
* Products covered by this bulletin comply with EMC Council  
directive 89/336/EEC regarding electromagnetic compatibility  
except as noted.  
L-6572B page 1 of 2  
 

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