Справочник Пользователя для Murphy rack puller rp75

RP-95028B/N

Revised 09-07

Catalog Section 40

(00-02-0106)

■

Pulls Injection Pump or 
Air Intake Shut-off Lever

■

30 lbf (133 N) Operating Force

■

Models Available for 12 or 24 Volt Systems

■

Operates on Signal from SWICHGAGE

®

Installed on the Engine or Driven Equipment

The RP75 rack puller is a semi-automatic device
that provides a pulling force to initiate shutdown
of diesel engines and equipment. 

The RP75 connects to the injection pump or air
intake shut-off lever via a cable (chain optional). 
A coil spring, within the RP75, is reset manually
and is held in place by an electromagnet. When
the SWICHGAGE

®

detects a malfunction, the

electromagnetic circuit is interrupted through a
Magnetic Switch–releasing the coil spring thus
pulling the cable/chain to actuate shutdown. The
spring, when fully compressed, exerts a pull of 30
lbf (133 N).

The RP75 is available for 12 or 24 VDC applica-
tions and is compatible with all SWICHGAGE

®

instruments. 

Operating Force: 30 lbf  (133 N) maximum, 

10 lbf (44 N) minimum.

Coil Voltage: Specify 12 or 24 VDC.
Coil Resistance: RP75-12: 32.2 ohms.

RP75-24: 129.8 ohms.

Length of Travel: 1-7/8 in. (48 mm).
Control Linkage

• Cable: 4ft. (1.22 m); Optional 8 ft. (2.43 m) 

• Chain (optional): 30 in. (762 mm).

NOTE: Specify options when ordering.
Shipping Weight: 5 lbs 3 oz. (2.4 kg).
Shipping Dimensions: 9-1/4 x 8-1/4 x 

5-1/4 in. (235 x 210 x 133 mm).

Specify model number.

Specify part number.
Part Number

12 VDC core assembly

Shaft solenoid assembly

Bushing shaft assembly

Case repair kit

Cocking rod, bushing and 
knob repair kit

Spring, main actuating

Spring, cocking rod return

2 Screws, machined #10-24
x 3/8 pan HD steel CAD II

24 VDC core assembly

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

Voltage
12 = 12 VDC
24 = 24 VDC

Calibration
Blank = 4 ft. (1.2 m) cable
8 = 8 ft. (2.4 m) cable
12 = 12 ft. (3.7 m) cable
C = Chain 30 in. (762 mm)

Reset Knob
and Stem

3-1/4 in.

(83 mm)

10-1/4 in.

(260 mm)

3-3/4 in.

(95 mm)

1-1/4 in.

(32 mm)

2-3/8 in.

(60 mm)

Wiring
Terminals

Mounting 
Studs
1/4-20 
(4 places)

5-1/2 in.

(140 mm)