Preventative Maintenance Model 360 and 363

The Model 360 tank cleaning machine has been designed

to operate under a wide variety of conditions and to provide

long-term reliability with a minimum amount of servicing. All

wear parts are have been engineered for quick inspection

and simple replacement. Servicing can be accomplished in

the field, eliminating the need to send machine elsewhere

for repair or maintenance.

Each cleaning application is unique, and therefore affects

the seals, o-rings, cups and bearings in a different way.

A good preventative maintenance program tailored for

you specific tank cleaning machines will help to eliminate

the possibility of failure during a cleaning cycle, or the

need to replace major cast parts later from excessive

wear. The expense of periodic inspection and subsequent

replacement of wear parts on a regular basis is less costly

than waiting until the machine fails to replace parts. The

added advantage to PM is that you have control over

when a machine is to be serviced; either between batches

or during the off season, instead of during a cleaning

cycle when you need reliability the most. Check with your

distributor for advice on establishing a PM program at your

facility.

It is recommended that a strainer be placed in line with the

pump to filter out small particles which could lodge inside

the tank cleaning machine decreasing its efficiency. This is

very important where recirculation of the cleaning solution

is being employed. The mesh and wire size of the strainer

will vary depending on the type of cleaning and particle

size. Be certain that the water supply system has been

flushed out to remove any solid particles before attaching

the Model 360 tank cleaner. Following each use of the tank

cleaner, we recommend a clean water rinse to thoroughly

remove any cleaning solution (recirculated or new) residue

which could affect the seals and o-rings during non

operational storage.

Oil level inside the gearbox should be checked regularly;

the specific time period to be determined by the type of

service the machine is in. The more severe the service,

the more often it is recommended to check the oil level. To

inspect oil level, turn machine upside down and remove

the gearbox cover. The oil level should just cover the lower

(623-A) gearset on the (616) final drive shaft (about 1”

below the machined end of the gearbox). All lubricated

machines are supplied with the following type of oil:

• OIL TYPE: Food Grade U.S.D.A. Acceptable H-1

QTY. 14 oz. (414 ml.) S.A.E. – 90

Oil Alternatives: For non-food industry applications, H-2

lubricants can be used such as Keystone Keygear 90,

KLC-20/50 or KSL-365. Lightweight gear oils (50-90) are

also suitable. It should be noted that heavy weight (140)

gear oils or greases will alter the performance of the

machine regarding cycle times. If upon inspection of the

gearbox there is cleaning solution mixed into the gear oil,

then it is advisable to inspect the rotor shaft seals (641-

TG), final shaft seal (640-V) and the gearbox cover o-ring

(644). Replace seals and o-rings as necessary

All of the Model 360 tank cleaners are shipped with

o-rings constructed of a Flourocarbon Elastomer (Viton)

compound. This compound is suitable for a broad range

or temperatures and chemical resistance. The type of

cleaning application and chemicals used will in large

part determine the length of service for o-rings. Upon

inspection, if an o-ring has any cracks, worn sections or is

swollen in size, then replacement is recommended.

The spring energized seals (part #’s 635-TG, 636-TG,

641-TG and 643-TG) have a PTFE alloy jacket which

increases the longevity and sealing capabilities. Once the

seals have worn thru the jacket to the spring, they are no

longer providing a proper seal. Particles in the cleaning

solution are then able to lodge in the machine, decreasing

its efficiency, and perhaps stopping it altogether.

Prolonged use with worn out seals can damage the

castings the seals were meant to protect.

A regularly scheduled inspection program is

recommended for the main bearing seals (635-TG and

636-TG). Inspection is easily accomplished by removing

the nameplate (606) and the nozzle housing assembly

(605). If these seals are worn, or need to be cleaned

of deposits, then the tee-housing seals will also need

attention.

All of the bearing clearances in the Model 360 tank

cleaner have been designed to provide the best possible

support for the adjacent parts, while maintaining reliability

between servicing. Most of the bearing clearances are

very close when the machine is assembled at the factory.

This allows for longer periods of operation before overall

machine performance is altered due to bearing wear. In

many cases, the bearings can wear down 25% and the

machine will continue to operate properly. It should be

noted that while the machine may continue to operate

with worn bearings, it is recommended that bearings be

changed at the first evidence of wear to protect the long

term performance and reliability of the unit. In severe

service (high pressure and / or chemical concentration),

the period between servicing will be shortened.

Several parts in the Model 360 have been designed as

replaceable wear parts. These parts are easily replaced

in the field at a reasonable cost, with a minimum of down

time or labor costs.

MAIN BEARING: After removal, inspect the bearings; they

may have grooves on the O.D. from particles or deposits

that may have lodged between the bearing and cup during

machine operation.

Also, if the clearance between the bearing O.D. and the

cup I.D. is loose compared to when new, it may be time

to change the bearings. The normal clearances between

cups and bearings are held to close tolerances to maintain

proper mesh of the bevel gears (617 and 618), and to

allow the maximum amount of wear on the bearings

before they need to be replaced.

Like any other type of bearing, if allowed to wear beyond

normal limits or if used in severe service without any

maintenance, the bearings may fail, which could alter the

performance of the machine. Refer to page 3-NOZZLE

HOUSING ASSEMBLY REMOVAL. Subsequently, if the

nozzle housing bearings need replacement, then the tee

housing bearings will also need to be changed. Refer to

page 5- TEE HOUSING.

CUPS: After extended use, the cups may show signs of

wear from one of the seals (636-TG or 635-TG) that has

worn thru the jacket into the spring. Rotation of the nozzle

housing or tee housing against the static seal can wear

a groove into the cup. This groove will prevent proper

sealing when a new seal has been installed. Replacement

of the cup is recommended whenever visual grooves or

wear marks are evident. (See Disassembly Procedure for

removal).

Cups will also wear out from rotation against the bearings;

however, often times the bearings can be changed 2

or 3 times before the cups may need to be replaced.

This is dependent on the type of cleaning solution,

pressure, chemicals and the regularity of inspection and

preventative maintenance.

ROTOR SHAFT BEARINGS: The upper and lower

carbide bearings that support the rotor shaft can easily be

inspected while the machine is fully assembled. To inspect

the upper and lower rotor shaft bearings (660-U and

660-L), remove the stator (609). Rotate the rotor shaft by

turning the rotor (610) with your finger or a screwdriver. If

the bearings allow side to side movement so that the rotor

is contacting the inlet stem wall, then the bearings need

to be replaced. Refer to Disassembly Procedure on page

4 and Assembly Procedure on page 6 for details on parts

replacement.

GEARBOX BEARINGS: There are six bearings inside

the gearbox, which maintain the gear shaft alignment.

Removal of the gearbox cover (602) and the geartrain

allows for inspection of these bearings. If there is notable

side to side play of one of the gear shafts (# 615, 616 or

622-SA) and one of the mating bearings (# 626-A, 627,

628, 629, 630) then replacement is recommended. Refer

to Disassembly Procedure on page 4 and Assembly

Procedure on page 7 for details on parts replacement.

NOTE: while it may appear that the

gearbox bearings are standard off-theshelf

bearings, they have all been modified

by the manufacturer to meet the design

specifications set forth by the manufacturer.

Replacement of these bearings by any type

other than O.E.M parts can compromise the

performance of the machine.