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9. Safety Brakes

The Safety Brake will automatically engage 
when the unit is horizontal, preventing disas-
sembly of the mast sections.  When this oc-
curs, the masts will extend, but not retract.  A 
special tool, which can be found in the Op-
erator’s Manual tube, is required to release 
the brakes.  If the tool is lost or damaged, 
one can be made simply from a piece of 1/8 
to 1/4 inch diameter steel rod 9 inches long 
with both ends bent into an “L” shape 1-1/4 
inches long. 

To release the brake, lay the lift back onto 
the winch wheels and place the tool into 
brake access slot located on the left side of 
the lift, and through the hole in the counter-
weight. 

Pull the tool down and the brake will release. 

It may be necessary to push the locked mast 
(or Carriage) up slightly while pulling down 
on the tool.  Once the brake is released, 
maintain pressure on the tool and slide the 
mast sections apart. 

Repeat this procedure for each mast section. 

When the brake is engaged, it will be pos-
sible to see the Brake Cam acting on the 
adjacent mast section.  Once the brake is 
released, it will rotate around into its nor-
mal position and will not be visible. 

10. Boom

To use Boom, pull spring-loaded ring and  
slide out the outer boom arm to desired 
station.  Release spring-loaded ring, mak-
ing sure that the plunger engages into the 
locating hole. To attach applied adapters, 
slide adapter in to the socket and secure 
with the set screw for no movement. 

Boom Capacity Chart 

Station 

Lbs.

500 

400 

350

Kg. 

225 

180 

160 

12 

Summary of Contents for SUMNER 784760

Page 1: ...nson Rd Houston TX 77088 p 281 999 6900 f 281 999 6966 CANADA 75 Saltsman Drive Unit 5 Cambridge Ontario N3H 4R7 p 519 653 5300 f 519 653 5305 NETHERLANDS Midden Engweg 21NL 3882TS Putten Netherlands...

Page 2: ...ntenance Instructions 16 17 Maintenance Record 18 Troubleshooting 19 20 2 OWNER S RESPONSIBILITIES Throughout this publication the words WARNING CAUTION and IMPORTANT will be used to alert the user to...

Page 3: ...und the winch drum 1 INSPECT THE EQUIPMENT If cable is kinked worn frayed damaged or has anything on it that would obstruct its rotation around the pulley wheels do not use the unit Use only Sumner Ma...

Page 4: ...ENT continued Avoid horseplay around equipment and keep bystanders at a safe distance Do not allow children to operate this unit and always keep them out of work areas Operate from the proper position...

Page 5: ...TEM UNLESS MAST ASSEMBLY IS IN THE LOWEST POSSIBLE POSITION TO ENGAGE THE CARRIAGE SAFETY LATCH Keep load at lowest possible position at all times 1 INSPECT THE EQUIPMENT continued 2 WORK AREA HAZARDS...

Page 6: ...obstructed movement of the unit Never leave elevated load unattended Do not use unit to support ladders for climbing hoisting or people moving Do not use unit outside in thunder light ning or severe w...

Page 7: ...ht lift upwards to a standing position while someone supports the unit from behind The unit is now ready to transport 3 Moving Lift in Work Area With Load Although it is best to move the unit to the j...

Page 8: ...balanced Note load capacity at given centers below Make sure the stabilizer legs are in stalled and locked into position 4 Reversing the Forks Disengage 2 spring loaded pins Rotate fork assembly 180 d...

Page 9: ...lower masts by turning winch crank counter clockwise Lock caster brakes when leaving unit unattended 6 Storing Forks Using two hands pull out on the two spring loaded rings located above the fork arms...

Page 10: ...nt of the lift Insert each leg into its respective mount ing socket making sure that the locking plunger fully engages Using the leveling screws level the lift un til the bulls eye bubble level shows...

Page 11: ...Hold Down from Safety Latch Loop on side of fork Operating Your Lift When operating the lift the Safety Latch can be looped onto itself for out of the way storage Resetting Safety Latch In the event...

Page 12: ...t Pull the tool down and the brake will release It may be necessary to push the locked mast or Carriage up slightly while pulling down on the tool Once the brake is released maintain pressure on the t...

Page 13: ...0 400 500 600 12 15 17 20 23 D istance frombackof fork in M axim um S afe Loa d LOAD CENTER 12in 15in 17in 20in 23in 30cm 38cm 43cm 51cm 58cm MAXIMUM CAPACITY 500lbs 400lbs 350lbs 300lbs 260lbs 227kg...

Page 14: ...forks up 16 11 5 15 m Height forks down 15 11 4 85 m Height Boom 16 6 5 03 m Fork ground clearance 3 75 9 5 cm Fork load height 5 75 14 6 cm Load capacity 12 load center 500 lb 225 kg Lift weight 279...

Page 15: ...15 Assembly Diagram Masts Carriage Assembly Leg Storage Rack Winch Assembly Handle Front Stabilizer Leg Mast Brace 8 inch wheels Fork Assembly Rear Stabilizer Leg Bubble Level Leveling Screw Base...

Page 16: ...teeth for wear If there is no sign of visible wear brush teeth with 50 wt Motor oil 5 For proper brake adjustment see Troubleshooting section on page 20 Replacing the Cable 1 Lower the carriage to en...

Page 17: ...ched to the lift 14 Check the safety brake operation Safety Brake Maintenance The safety brake will automatically engage when the unit is horizontal preventing disassembly of the mast sections When th...

Page 18: ..._____________________________________________ Action Date _____________________________________________________________________ Action Date ____________________________________________________________...

Page 19: ...r wheels are not rotating If wheels and mounting hardware are not damaged clean wheels and lubricate shoulder bolt If the wheels do not rotate freely replace roller wheel assembly Inspect mast section...

Page 20: ...will not disengage See illustration and instructions below The idler gear is displaced Make sure that the idler rotates freely and the teeth on the idler gear are not worn Safety brake will not relea...

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