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MODEL 770
TRANSMISSION JACK
1 -1/2 TON CAPACITY
USER'S MANUAL
Jackco Transnational Inc. © 2010
South El Monte, CA
888-452-2526 www.jackco.com
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FOR YOUR SAFETY
Read all instructions, warnings and cautions carefully. Follow all safety precautions to avoid personal
injury or property damage during system operation. Jackco cannot be responsible for damage or injury
resulting from unsafe product use, lack of maintenance or incorrect product and/or system operation.
Contact Jackco when in doubt as to the safety precautions and operations.
Failure to comply with the following cautions and warnings could cause equipment damage and
personal injury.
• This jack is designed for transmission and
ins tall atio n o f a utom obil e a nd ligh t t ruck
component parts. The instructions must be
carried out conscientiously in order to operate
the jack safely and properly.
• Stay clear of loads supported by hydraulics.
A cylinder, when used as a load lifting device,
should never be used as a load holding device.
After the load had been raised or lowered,
it mu st alway s b e blo cked mech anica lly.
• Do not exceed equipment rating never attempt
to lift a load weighing more than the capacity
of the cylinder. Overloading causes equipment
failure and possible personal injury.
• BE S U R E SETUP IS STA B L E BEFORE
LIFTING LOAD.
• A v o i d s i t u a t i o n s w h e r e lo a d s ar e n o t
directly centered. Off-center loads produce
c o n s i d e r a b l e s t r a i n o n cy l i n d e r s a n d
plungers. In addition, the load may slip or
fall, causing potentially dangerous results.
• To avoid personal injury keep hands and feet
away from work piece during operation.
• NEVER set the relief valve to a higher pressure
than the maximum rated pressure of the pump.
Higher settings may result in equipment damage
and/or personal injury. Do no remove relief
valve.
• Keep hydraulic equipment away from flames
and heat. Excessive heat will soften packing and
seals, resulting in uid leaks. Heat also weakens
hose materials and packings. For optimum
performan ce do not expose equipment t o
temperatures of 150°F or higher. Protect hoses
and cylinders from weld spatter.
• Hydraulic equipment must only be serviced by a
qualied hydraulic technician. For repair service,
contact JACKCO Inc. To protect your warranty,
use only JACKCO hydraulic oil.
• Immediately replace worn or damaged parts
genuine JACKCO parts. Standard grade parts
will break causing personal injury and property
damage. JACKCO parts are designed to fit
properly and withstand high loads.
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SPECIFICATIONS:
LIFTING
CAPACITY
1.5 Ton 220mm / 8.6" 943mm / 37" 133Kgs / 293 lb 153Kgs / 337 lb
OPERATING INSTRUCTIONS:
MIN. HEIGHT MAX. HEIGHT N.W G.W. PACKAGE SIZE
115 x 72 x 40 cm /
45" x 28.3" x 15.7"
1. Position the saddle under the transmission:
The saddle may be tilted forward and back or side to side to
receive the transmission.
2. Close the release valve. Operate the pump handle to raise
the saddle and align the saddle with the transmission.
3. Remove the transmission according to the instructions in the
vehicle service manual.
4. Secure the transmission to the saddle.
5. Lower the transmission by slowly opening the release valve.
The release valve also regulates how fast the saddle is
lowered.
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MAINTENANCE
IMPORTANT : Dirt is the greatest single cause of failure in hydraulic units. Keep
the jack clean and well lubricated to prevent dirt/debris from entering the system.
If the jack has been exposed to rain, snow, sand, or grit, it must be cleaned
before it is used.
1. Store the jack in a well-protected area where it will not be exposed to corrosive
vapors, abrasive dust, or any other harmful elements.
2. Regularly lubricate the moving parts.
3. To check the oil level, place the jack on level ground lower the lift arm
completely. Remove the ll plug. The oil level should be within 3/8” of the ller
plug hole. Do not overll. If necessary, add approved anti-wear hydraulic jack oil,
and install the ller plug again.
IMPORTANT : The use of alcohol, hydraulic brake fluid or detergent motor oil
could damage the seals and result in jack failure.
4. Inspect the jack before each use. Take corrective action of the following
problems are found:
a . Cracked or damaged housing
b . Excessive wear, bending, or other damage
c . Leaking hydraulic uid
d . Scored or damaged piston rod
e . Malfunctioning swivel heads or adjusting screws
f . Loose hardware
g . Modied or altered equipment
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TROUBLESHOOTING
Caution: To prevent personal injury, all inspection, maintenance, and repair
procedures must be performed when the jack is free of load.
Trouble Cause Solution
1. No hydraulic oil. 1. Fill hydraulic oil.
2. Release valve opened. 2. Close release valve.
Jack dose not lift at all
Jack lifts only partially
Jack lifts load, but
doesn’t hold
3. Defective suction valve and
delivery vavle.
4. Defective packing. 4. Replace packing.
1. Lack of hydraulic oil. 1. Fill hydraulic oil.
2. Excess of hydraulic oil. 2. Drain out excess hydraulic oil.
1. Improper contact of suction
valve, delivery valve & by-pass
valve.
3. Clean dust or sludge.
1. Clean and adjust all valves.
Jack does not lower
Poor lifting
2. Worn out piston packing. 2. Replace piston packing.
1. Release valve blocked by foreign
material.
1. Defective pump packings and/or
incorrect valving.
1. Clean release valve.
1. Clean release valve, replace
packings and hydraulic oil.
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PARTS LIST
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Part No. Description Q'ty Part No. Description Q'ty Part No. Description Q'ty
1 Caster Assy. 4 34 Rod Link 1 1-32 Copper Washer 1
2 Washer 6 35 Pin 1 1-33 Screw 1
3 Nut 6 1-1 Washer 1 1-34 Copper Washer 1
4 Frame Board Assy. 1 1-2 Washer 2 1-35 Washer 3
5 Bolt 2 1-3 O-ring 1 1-36 Bracket 1
6 Shaft 1 1-4 Piston Rod 1 1-37 Pin 1
7 Washer 1 1-5 Piston Ring 1 1-38 Y-ring 1
8 Rod Link 2 1-6 Sealing Washer 1 1-39 O-ring 1
9 Washer 2 1-7 O-ring 1 1-40 Cylinder Pump 1
10 Saddle Seat 1 1-8 Washer 1 1-41 Pump Cylinder 1
11 Shaft 1 1-9 Washer 1 1-42 Dustproof Plug 1
12 Washer 4 1-10 Body 1 1-43 Washer 2
13 Bracket 1 1-11 Oil Filler Plug 1 1-44 Pin 2
14 Nut 2 1-12 Washer 2 1-45 Handle 1
15 Shaft 1 1-13 Bolt 2 1-46 Handle Sleeve 1
16 Pin 2 1-14 Bolt 1 3-1 Bolt 2
17 Bolt 9 1-15 Copper Washer 1 3-2 Washer 2
18 Handwheel 2 1-16 Valve 1 3-3 Washer 2
19 Screw 2 1-17 Steel Ball Φ6 2 3-4 Chain 2
20 Nut 3 1-18 O-ring 2 3-5 Nut 2
21 Shaft 1 1-19 Release Valve Rod 1 3-6 Bolt 4
22 Washer 6 1-20 Pin 1 3-7 Bracket 2
23 Nut 2 1-21 Release Nob 1 3-8 Bracket 1
24 Bearing 4 1-22 Screw 1 3-9 Washer 4
25 Nut 2 1-23 Steel Ball Φ4 1 3-10 Nut 4
26 Shaft 1 1-24 Ball Seat 1 3-11 Nut 2
27 Shaft 1 1-25 Spring 1 3-12 Washer 2
28 Grease Fitting 1 1-26 Screw 1 3-13 Bracket 2
29 Lift Arm Assy. 1 1-27 Sealing Washer 1 3-14 Nut 2
30 Pin 2 1-28 Screw 1 3-15 Bolt 2
31 Shaft 2 1-29 Spring 1 3-16 Hook 2
32 Rod Link 2 1-30 Steel Ball Φ9 1 3-17 Bolt 2
32 Washer 2 1-31 Spring 1 3-18 Board
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LIMITED ONE YEAR WARRANTY
Jackco Transnational Inc. warrants all Jackco equipment and tools to the original purchaser against any manufacturing defect in material or
workmanship for a period of one (1) year from the original date of purchase. If the defective equipment or tool is determined to be covered under
this warranty, it shall be repaired or replaced at manufacturer's discretion without charge, provided that the equipment or tool must be returned
with proof of purchase to the dealer and freight prepaid, if returned to the manufacturer. This warranty shall not apply to damage due to accident,
negligent use, and lack of maintenance, abuse or applications other than the specic function the equipment or tool is designed for.
No other warranties, expressed or implied, including those of merchantability or tness for particular purpose shall be applicable to Jackco
except as specifically stated herein. In no event shall Jackco be liable to any party for any special, direct, indirect, consequential, punitive
damage of any nature caused by the sale or use of the equipment or tool.
Note: This warranty gives the original purchaser specic legal rights which may very from state to state.
Jackco Transnational Inc. © 2010
South El Monte, CA
888-452-2526 www.jackco.com
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