Crane Anti-2-Block
The LIFTek L25 Wireless Anti-Two-Block System is built to last. Most are in service for 10-15 years. Easy to repair in the field (not a throw away product!). Simple operation and installation. Universal fit on any crane or hoist. Best value – total operating cost – about 7 cents per hour. Change battery once every 5 years. Same Day Shipping on systems, parts and repairs. Immediate technical support. Call 1-888-LIFTek8. The L25 is made in the USA and is the choice of major OEMs like Terex, National, Manitex and others
-
The standard L25 Radio Anti-Two-Block System includes one RAT Boom switch, receiver, weight & chain, installation kit and manual. It will provide horn and light warning alarms for 1 winch on main or jib. Add the 2nd Winch Kit to protect a second winch. -
L25 Switch, Weight and Chain Kit (Lithium Battery TX) w/ installation hardware -
LIFTek offers the following versions of the boom tip transmitter switch. L25RS-1E Standard RAT Switch - with lithium D-cell. 5+ year battery life. This is the standard product for North America. L25RS-2 3C version - uses an alkaline battery pack for international shipping. Estimated battery life 2.5 years. L25RS-3 SW Saltwater version with lithium D-cell, sealing boot on switch plunger. (Override flag cannot be used). L25RS-4 3C+SW Saltwater version with 3C alkaline battery pack. -
The L25 Installation kit includes the hardware needed to mount a boom tip switch and L20D display on a crane. This kit is included with the system. May be purchased for a 2nd crane to allow a system to be used easily on 2 different machines. Content can vary from photo. Includes:- Boom switch mounting hardware.
- Display mounting bracket and hardware.
- Display power pigtail (connects to crane power).
- Operator and Installation manuals.
-
1) Lithium D-cell battery replacement kit (L2581A) 2) Alkaline battery pack - 3C (L2594-3C) 3) L25 Antenna Replacement kit (L2545) 4) Boom Switch Storage Flag (L2516) 5) Boom Switch Cover (L2618) 6) Eyebolt w/ mounting nut (4" or 6") Call. 7) Boom Switch Transmitter PCB Assembly (L2540A) 8) Boom Switch Gasket (L2508) 9) Antenna Strain Relief (switch - L2258, RX - L2256) -
L25 Radio A2B systems supplied on certain model Manitex Boom Trucks, Manitowoc Boom Trucks, and Skycranes from Nov 2000 to the present. Compatible parts and service are available for the units. Power pigtails (connection to the truck power) can vary. Please confirm your type when ordering. See the photo showing the 3 types. -
L25 Radio A2B systems supplied on certain model Jomac and Skypicker Boom Trucks. Compatible parts and service are available for the units. Power pigtails (connection to the truck power) can vary. Please confirm your type when ordering. See the photo showing the 3 types. -
L25 Radio A2B - used on digger derricks An anti-two-block is now required by OSHA when using a digger derrick for regular crane work. Only pole handling is exempted. This L25 includes a special weight and chain which reduces wear when used with synthetic rope. Weight is painted black -
USTC Cranes were supplied with L20 and L25 Radio A2B Systems. Parts and service is available for these units. Boom transmitter switch and power pigtail may vary. Please provide model and serial number from these units when ordering parts. -
This section explains how to specify the size, number and voltage of lockout valves for your crane. These valves will most likely NOT be needed if your truck already has a factory installed anti-two-block system. The L25 will drive those valves. Please check with us to see if a relay kit might be needed. -
These 3000 psi valves are used to shut off crane functions on hydraulic cranes during a two-block (or overload) condition. Used on winch up, telescope out, boom down. They automatically allow corrective action: winch down, telescope in, boom up. -
Hydraulic Lockout Valve Assy (15 gpm, 5000 psi, SAE8 1/2" ports, w/ Manual Override, 12V 28W Coil, DIN field wireable connector, 5.6" x 3.4" x 1.5")