Keiser Infinity Series Manuel

KEISER

Infinity Series

Operations & Maintenance

Manual

INTRODUCTION

We take pride in designing and building the highest quality fitness equipment on the market. This

means that you will enjoy years of low maintenance and minimal repair from every one of our

products. Only the highest quality products have the Keiser name on them.

This manual will assist you with the assembly, maintenance and safe operation of the Keiser

Infinity Series. We strive to continuously improve our products, therefore, parts and machine

designs are subject to change without notice. Please call our Service Department at (800) 888-

7009 or visit our website at www.keiser.com for the latest product information.

CAUTIONS, WARNINGS AND NOTES

Please read all instructions contained in this manual prior to assembling and using this product.

Failure to follow these instructions will invalidate the product warranty and could lead to serious

injury.

We use the term Caution! to document things that could cause bodily injury to persons on or

around the equipment if the information contained herein is ignored.

The term Warning! is used to ensure the proper installation of components for maximum

machine life and user safety.

Note! is used to document things that we recommend and things to be aware of before

performing a particular instruction.

WARRANTY

All products manufactured by Keiser Corporation shown in this manual are warranted against

defects in materials and workmanship as follows (providing the damage was not caused by

abuse, misuse, or neglect of normal care) :

Structural Integrity of Frame Members – 10 years;

Cylinders, Gauges, and all Electrical Components – 3 years (1 year if compressed air is not

dried);

Compressor and Dryer, Cables, Pulleys, and Bearings – 2 years;

Pneumatic Valves and Chrome – 1 year;

Paint, Upholstery, Seat Belts, Hand Grips, and other Rubber and Plastic Products – 90 days

The warranty terms begin with the date of original delivery to be evidenced by appropriate

shipping documents. Any alteration of the equipment so listed without express written consent of

Keiser Corporation shall constitute a waiver by the buyer of this warranty. This warranty does not

cover other brand name products distributed by, but not manufactured by Keiser Corporation

which are subject to their respective manufacturers’ warranties. During the warranty period,

warranted defects will be repaired at Keiser Corporation, Fresno, Calif., or the defective part will

be replaced, at the option of the manufacturer, without charge for either parts or labor to repair

the defective part. This warranty does not cover the removal of the defective part and the

installation of the repaired part. All claims under the warranty must be in writing and authorization

obtained from the manufacturer, Keiser Corporation, to return defective parts for exchange.

Defective parts must be returned to Keiser Corporation.

User’s agents, or anyone directing the use of said equipment shall determine the suitability of the

product for its intended use, and said parties are specifically put on notice that they shall assume

all risk and liability in connection herewith. There are no warranties that attach to this product

from the manufacturer either express or implied other than those specifically set forth above.

Process:

Call the Keiser Service Department at (800) 888-7009, Monday through Friday between 7:00 a.m.

and 5:00 p.m. PST. Provide the following information:

Customer number:

Serial number(s):

As parts are ordered, the service technician checks the original delivery date to the customer, to

determine whether the part is a warranty replacement or not. The parts are sent to whoever is

responsible for the repair. Keiser Corporation will not be responsible for improper repairs made to

Keiser machines. Keiser Corporation will not be responsible for non-authorized replacement parts

used in repairs. Products or parts produced by another manufacturer and distributed by Keiser

Corporation will be covered by the respective manufacturer’s warranty.

Warning! Failure to follow the instructions as provided in this manual or any other

instructions pertaining to the assembly and/or operation of this equipment will result in

voiding the warranty and could lead to serious injury.

PREVENTIVE MAINTENANCE SCHEDULE

This maintenance schedule is the recommended minimum requirement for all KEISER

machines. Failure to follow these instructions at the suggested intervals will constitute

neglect of normal care as required by the warranty.

Maintenance Schedule

Table 1

TROUBLE SHOOTING

The following section will help you to diagnose any problem that might occur on your

KEISER machines. Find the problem in the under-lined headings and check each part of

the system as described in the questions below it. By following this method, the most

likely problems will be checked first.

PROBLEM: No resistance when increase valve is depressed.

Is the machine's quick-disconnect plugged into the air system?

YES ↓NO →Plug in the quick-disconnect

Do all other machines work?

YES ↓NO →Check the compressor

Does the machine work when plugged into another outlet?

NO ↓YES →Replace that outlet

Are any hoses kinked or damaged?

YES ↓NO →Check the valves

Repair or replace the hose

PROBLEM: Exercise action is rough, noisy, uneven, or spongy.

Are the cylinder rods clean and lubricated?

YES ↓NO →Clean and lubricate rods (figure 7, pg. 15)

Are any hoses kinked?

NO ↓YES →Straighten or replace damaged hose (see pg.9)

Are all pivot bearings lubricated?

(Note: Sealed ball bearings without fittings are lifetime lubricated)

YES ↓NO →Lubricate the bearings (see pg. 21)

Are pivot bushings badly worn?

NO ↓YES →Replace bushings

Is the exhaust muffler clogged?

NO ↓YES →Replace the muffler (figure 7, pg. 15)

Check the cylinder bore for proper lubrication (see pg. 14)

PROBLEM: Pressure changes without valves being actuated.

Replace the valves (see pg. 11)

DIGITAL DISPLAY

The digital display is battery powered. Periodic maintenance is limited to battery

replacement. The display will show the set resistance and repetition count during use.

When the equipment is idle the display will go into battery saver or sleep mode and will

display "off". When the batteries are approaching the need for replacement the display

will show "loba" instead of "off". As long as there is any life in the batteries at all

pressing the increase or decrease buttons will activate the display and it will work as

normal.

When replacing batteries use two industrial alkaline "D" cell batteries. These are accessed

by removing the cover of the electronics box fastened to the frame of the machine. To

remove the cover, pull or pry the sides of the cover outward to free the detent boss from

the holes in the body of the box. No removal of screws is necessary.

When the batteries have been replaced the display will run through a self check flashing a

series of numbers. Once the test sequence stops and the display shows "off" the

equipment is ready to use.

AIR HOSES AND FITTINGS

COMPRESSION FITTINGS

All KEISER machines use polyethylene tubing and "compress-align" fittings to connect

the various pneumatic components within the machine.

If an air leak is suspected, first listen closely to the air hose connections. Leaks will make

a hissing noise. Very slight leaks may not be loud enough to hear. These may be detected

by dabbing soapy water on the suspected leak. Escaping air will make bubbles. If the leak

is at the fitting, first tighten the nut no more than one-quarter of a turn. Test the

connection again. If the fitting still leaks, the nut must be replaced. In most cases the air

hose should be long enough to allow this, if not, order a new air hose from KEISER.

To install a new hose, fitting or nut:

1. Cut the tubing as close as possible to the nut. The cut must be clean and square.

2. Slip a new nut over the tubing.

3. Insert the tubing into the fitting all the way to the shoulder inside the fitting

(see cutaway illustration).

4. Hold the tubing in the fitting and slide the nut down onto the fitting. Tighten the

nut as tight as possible with the fingers, then one full turn with a wrench.

Figure 3

BARB FITTINGS

KEISER machines also use a 1/4” urethane hose. This is more flexible than the

polyethylene tubing and is always installed on a barb style fitting. Barb fittings may also

be used on some machines with the 1/4” polyethylene hose and are used on all thumb

button air valves. Correct diameter of the barb is critical for proper sealing. Always use

barb fittings supplied by KEISER for proper fit. Hoses are installed to the barb fittings by

pushing the hose over the fitting. The barb ridges provide an air tight seal.

When replacing a component or hose using barb fittings:

1. Cut the tubing 1/2” away from the component to clear the barb ridges.

2. Pry the short hose section off the barb, being careful to avoid nicking or cutting

the barb ridges.

3. Check the condition of the barb ridges. If they show cuts or nicks, replace the

fitting. When replacing a barb fitting a thread locking compound

(such as “Loctite242 -Blue”) must be used on the threads to provide a proper air

seal.

4. Push the end of the hose onto the fitting as far as you can.

Note: The urethane hose may be pried off the fitting without cutting the hose.

The end of the hose will enlarge with repeated removals and will lose the ability

to seal properly. If this happens cut 1/4" off of the end of the hose and reattach it

to the barb.

QUICK-DISCONNECT

The feed hose is connected to the quick-disconnect using a barbed fitting on the quick-

disconnect. If the feed hose must be repaired, shortened, or replaced, follow the

procedure just outlined for BARB FITTINGS.

FILTER

The filter keeps moisture and dirt out of the cylinders and other components. KEISER air

systems incorporate a refrigerant dryer on the compressor. Refer to the preventive

maintenance chart for time interval for checking filters (table 1, pg. 4).

The filter on your KEISER machines is an “in line” filter. This filter cannot be

disassembled and has no drain. When the filter element is dirty, the element turns a bright

pink or red. At that point the filter must be replaced. Contact the KEISER Service

Department for replacement filters.

All filters have a directional arrow and must be installed so the arrow points in the

direction of air flow into the machine. Always decrease the resistance to zero before

starting service or repair on any machine.

-CAUTION-

IF THE FILTER BOWL IS CRACKED, IT MUST BE REPLACED IMMEDIATELY.

-NOTICE-

IF FILTER BOWL IS CRACKED, AN AIR LEAK COULD RUN THE COMPRESSOR

CONTINUOUSLY, PUTTING EXCESSIVE WEAR ON THE COMPRESSOR.

Figure 4

Direction of Air Flow in Filter

VALVES

-WARNING-

BEFORE ANY DISASSEMBLY, THE MACHINE MUST FIRST BE UNPLUGGED

FROM THE AIR SUPPLY AND THE RESISTANCE DECREASED TO ZERO.

KEISER equipment uses a variable flow thumb valve capable of very fine adjustment to

the resistance.

Note: There is a high pressure port and low pressure port on each valve. The decrease

valve has the hose from the manifold connected to the high pressure port. The

hose connecting the corresponding port on the increase valve should come from

the filter and is the high pressure supply hose. If the hoses are not correctly

installed, the valve will not seat properly and will not hold a set resistance.

REPLACING THUMB BUTTON VALVES

TOOLS REQUIRED: 5/64" Allen wrench, Slotted screwdriver, Sharp knife.

1. Unplug the quick disconnect on the supply hose and decrease the resistance

to zero.

-CAUTION-

IF RESISTANCE IS NOT REDUCED TO ZERO BEFORE REMOVING THE +/- CAP,

THE VALVE SPOOL MAY “SHOOT” OUT OF THE VALVE HOUSING.

2. Remove the +/- cap from the handle and pull the valve out using the flange on the

valve. If you pull out on the thumb button, you will remove the thumb button

spool assembly. Pull out until the hoses can be cut about 1/2” from the bottom

of the valve housing.

Mark the hose connected to the barb on the side next to the two ball plugs in the

side of the valve housing. This is the high pressure hose and must be correctly

reconnected or the valve will not seal properly.

If you have a machine equipped with an optional digital display, the valve will

also have one or two wire connectors plugged into the end.

Sometimes it is necessary to push the hoses into the exercise arm where they enter

it from the machine frame to get enough slack to remove the valve.

3. Disconnect any electrical connections, if you have two on one valve, they may be

reconnected either way. Pry the hoses off the barb fittings or cut each about 1/2”

from the end of the valve housing and pry the short piece off each barb. The

decrease valve has a short piece of hose on the barb that serves as an exhaust

muffler.

-NOTICE

DO NOT CUT ACROSS THE RIDGES ON THE BARBS. DAMAGED BARBS ARE

AREAS FOR POSSIBLE LEAKS.

4. Replace the valve, pushing the high pressure hose onto the barb on the side with

the two pressed in balls. On the increase (+) valve the second hose connects to

the machine system. On the decrease (-) valve the short notched hose or muffler

connects to the other barb.

Those machines equipped with the digital display also require plugging in the

electrical connector. On these machines it is essential that the electrical wires

have enough slack so the connector is not pulled off if the hoses must be pulled in

during installation of the valve.

-NOTICE-

USE CARE DURING INSTALLATION. DO NOT PULL THE CAP OUT ON A NEW

VALVE AS THIS WILL REMOVE THE CAP-SPOOL ASSEMBLY AND MAY DAMAGE

ONE OF THE "O" RINGS ON THE SPOOL. IF THIS OCCURS THE VALVE MAY NOT

SEAL PROPERLY.

5. Replace each increase (+) and decrease (-) cap with the (+) or (-) symbol toward

the user when in the exercise position. When in the exercise position, the increase

(+) cap should be on the right side handle.

6. Reconnect the quick disconnect to the compressed air system.

-NOTICE-

BOTH INCREASE AND DECREASE CAPS MUST BE SECURED IN PLACE. IF THE

AIR SUPPLY IS CONNECTED WITH THE CAPS REMOVED AND THE THUMB

BUTTON IS PULLED SLIGHTLY, IT IS POSSIBLE TO BLOW THE SEAL OUT OF

THE VALVE

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