STS MAC JR 1200E User manual

Surface to Surface Inc. ®
Operators Manual
** MAC JR 1200E **
USE IN CONJUNCTION WITH M2-E922 MIXER MANUAL (ENCLOSED)
Unit Serial No. _______________
M2-E922 Mixer
Serial No. ______________
Links relating to this Manual
www.stsmixers.com
STS-175 Rev. 03/12/19 www.stsmixers.com
Dealer

2
TABLE OF
CONTENTS
PAGE
STS Inc. Warranty…………………………………………….…………….. 5
Safety Statements……………………………….…………….…...………… 6-9
Safety Markings………………………………………….….………………. 10
Main Working Components (Photo)…………………….………….……… 11
Introduction to the MAC JR 1200E ……….……….…….…….…..………. 12
.
MAC JR 1200E Foot Print (top view)……………………………………..… 13
MAC JR 1200E General Data Sheet ……………..……….…….……..……. 14-15
Identifying Your Machine & Components …………………………..……. 16
SECTION II (Description, Care and Maintenance)
Base Skid with Tanks .……….………....…..…...…….….…..…….… 18-20
Internal Tank Nozzles ……………….……….…….….…..…………. 21
External Piping ……………………………...…….…...…………..…. 22
Leveling Jacks ………………….………….….………………...……. 23
2 Cone Head Assembly ………….…………….…….……….….….… 24
Cone Manifold ……………….….….….………………...…………… 25
Hydro-Cyclones …….…….…..….…..…...….....……….……….…… 26
Over-Flow Box .….….….……..………..…….…….………...….…… 27
Under-Flow Box ……………….………...……...…….....…..….…… 28
Valves on the M2-922 Mixer ……………….….………...…………… 29

3
TABLE OF
CONTENTS
PAGE
SECTION III (Set-up and Connection of unit in Detail)
Site Set-up (work mode) ……………………………………..……….. 31
Hose Connections ……………..………..….……….…....….….…….. 32
Site Tear-down (transport mode) …………………….…..….…….….. 33
SECTION IV (Operating the MAC JR 1200 Unit.)
Site set-up and pre-check …………………………………………….. 35
Mixing New Drilling Fluid …....………………………………..…… 36
Transferring New Drill Fluid to Active Tank ………..………………. 37
Agitating the Active Tank …………..……….….….….…..….……… 38
Cleaning the Dirty Fluid for Re-use …………..….….….……….…… 39
Shutdown, cleanup & storage
Warm weather …………………………………….…………. 40
Cold/ freezing weather ………………………………….…… 41
Prolonged Periods of Storage …………………………..…… 42
SECTION V (Trouble shooting)
Trouble Shooting the MAC JR 1200 …………..…..….………..…… 44-45
.
SECTION VI (Periodic Maintenance & Repair Information)
Maintenance Schedule …….……………….….………………….…... 47
Bolt torque Specifications ………………….………………….……... 48
Notes ……………………………………………………..…………… 49

4
TABLE OF
CONTENTS
PAGE
SECTION VII (OEM Repair / Information)
Leveling Jack Breakdown ………………………...…...…..…….……… 51
Gruvloc® Pipe Couplings ………….…….….…..…….…….……..…… 52-54
SECTION VIII (Parts Manual)
MAC JR 1200E PARTS MANUAL ………………….……………….…. 56-63

5
Limited Warranty
United States and Canada
Surface to Surface Inc. or it’s subsidiary which last sold the product, warrants new products sold by it for use in the
United States and Canada to be, at the time of manufacture, free from defects in workmanship and materials. This
warranty covers for a period of Twelve (12) Months of operation from the date of delivery for initial use, whichever
comes first.
Exclusions and Additional Limitations
1. This warranty relates to the condition of the product at the time of manufacture and does not cover parts or
service as a result of:
(a) Normal wear and tear or required maintenance including, without limitation, adjustments or replacement of
components subject to wear and tear, such as belts, hoses, seals and/or packing, fuses, bulbs,
switches and ignition parts.
(b) Abuse including, without limitation, neglect, improper operation, misapplication, overloading, accident or
alterations not approved by Surface to Surface Inc.
(c) Lack of maintenance, including, without limitation, failure to inspect and maintain, improper repair, use of
“unapproved parts”, cracked engine heads and blocks unless caused by the failure of
an internally lubricated part or repair of engine valves, rings or guides.
2. The Company’s warranty does not apply to purchased components manufactured by others where separate
warranty is made by the manufacture of such components and will be applied as interpreted by
the supplier.
3. All claims under his warranty shall be submitted in writing by the distributor to the Company, which will be the
sole judge in determining the merits of the claim.
4. The company shall have the right to have all products or parts claimed to be defective returned to it and the
cost of shipping such items shall be borne by the distributor.
……………………………………………………………………………………
Warranty Registration Card
In order to help us provide complete service for our product, please complete this card and return it.
If not returned, all requests for warranty will be denied.
Print Name: …………………………………………………………………….….
Address: …………………………………………………………………………...
City: ……………………State/Province………………Zip/PC…………………...
Model No. ………………………….. Serial No. …………………………………
Date of Purchase ………………………… Dealer ………………………………..
Return to: Surface to Surface Inc.
5150 Forest Rd. RR#3
Watford, Ontario, Canada
N0M 2S0
01/14/08

6
MAC JR 1200E
SAFETY STATEMENTS
Your personal safety and the safe operation of this unit are the concern of Surface to Surface Inc., and by
reading and understanding this manual and understanding the safety statements, you will decrease the risk of
personal and equipment damage.
Safety statements are listed here and throughout this manual to draw your attention to potential hazards that
may be encountered while operating this piece of equipment. While reading this manual, you will notice that
certain safety statements will relate directly to the operation, or maintenance of that particular part of the unit and
should be followed carefully. Decals on the unit also follow the same format as the warnings in this manual, and
therefore should be kept in good repair to alert the operator and others of the potential hazard.
This safety alert symbol appears with most safety statements.
It means attention, become alert, your safety is involved!
Please read and abide by the message that follows the safety alert symbol.
DANGER
WARNING CAUTION
CAUTION
Caution "without the safety alert symbol"
indicates an potentially hazardous
situtation that can cause damage to the,
machine, personal property and / or the
environment or cause the machine to
operate improperly.
Danger (the word "DANGER" is in white
letters with a red rectangle behind it)
indicates an imminently hazardous
situation, which, if not avoided, will
result in death or serious injury.
Danger is limited to the most extreme
situations.
Warning (the word "WARNING" is in black
letters with an orange rectangle behind it)
indicates an potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Caution (the word "CAUTION" is in black
letters with a yellow rectangle behind it)
indicates an potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury.

7
MAC JR 1200E
SAFETY STATEMENTS
The following caution statements have been drawn from the instructions in this manual. They
have been assembled here for ready reference.
DANGER
NEVER TRANSPORT
WARNING
NEVER USE BODYPARTS,
OR FOREIGN OBJECTS
in an attempt to unplug or clean the
tank inlets or tank jetnozzels.
Serious personal inj uryor
damage will result.
WARNING
Serious personalinjurywill result.
DO NOT REMOVE OR MODIFY
SAFETYCOVERS OR GUARDS.
WARNING
while the unit is inoperation.
Serious personal injurywill result.
NEVER ATTEMPTTO REMOVE OR
CLEAN THE HYDRO-CYCLONES
CAUTION
DO NOT POSITION
ANY PART OF YOUR BODY
over the under-flow or
over-flow box while operating.
DANGER
IN AN EMERGENCY
DANGER
NEVER ATTEMPT REPAIRS
OR DISASSEMBLY
STOP the mixer / pumping unit
to halt the pump, and fluid flow
without shutting off the mixing unit
and disconnecting anypower sources.
Seriouspersonal injurywill result.
DANGER
NE VER ATTE MPT TO P UT
THE UNIT INTO OPERATION
without lowering the unit to the ground
andlevelingwiththe jacks.
Seriouspersonal injurywill result.
the unit without the wheel locks
engauged in the transport position,
the tongue extended andpinned
andthe levelingjacks fullyretracted.

8
MAC JR 1200E
SAFETY STATEMENTScontinued
The following caution statements have been drawn from the instructions in this manual. They
have been assembled here for ready reference.
CAUTION
WHEN THE UNIT
IS IN OPERATION,
the fluid in the piping and hoses
mayreachpressures up to50 p.s.i.
CAUTION
BEFORE STARTINGOR RESTARTING
the mixer, make sure the suctionvalve
on the proper tank is open, and the
fluidlevel inthe tank is above
the suction port.
CAUTION
TRAPPED FLUID MAY BE PRESENT
and will spill out when piping or
hoses are removed.
CAUTION
NEVER LEAVE LIQUID INTHE
PIPING, HOSES ORTANK
during freezing weather conditions,
as damagewill result.
Followinstructionfor winterizing.
CAUTION
AVOID ALLOWING FOREIGN MATERIAL
into the Tanks.
CAUTION
CARE MUSTBE TAKEN WHEN
INSTALLINGTHE COUPLER GASKETS.
If the gaskets are not properlylubricated
andinstalled, a leak maydevelop.
CAUTION
CARE MUSTBE TAKEN WHEN
CONNECTINGTHE HOSE COUPLINGS.
The faces must be clean before mating
together. Rotate bodytoengauge lock.
CAUTION
DONOTCONNECTCHAINS OR STRAPS
to piping or other parts of the unit.
D-Hooks are providedon the base
structure for suchuse.

9
MAC JR 1200E
SAFETY STATEMENTScontinued
The following caution statements have been drawn from the instructions in this manual. They
have been assembled here for ready reference.
WARNING
REFER TOTHE SAFETY
STATEMENTS IN THE
OEM MANUALS SUPPLIED
AND THIS MANUAL
REGARDI NG THESE
OPERATIONS.
CAUTION
The manufacturer should be consulted
whenconsideringalternative uses
for this piece of equipment.
This unit was designed for the mixing,
cleaning and storing of drilling fluid.
Other uses maycreate unforeseen
safetyissues and personal injuryrisk.

10
MAC JR 1200E
Safety Markings
Hazard and warning markings have been placed at appropriate points on the unit. International symbols
have been used, in order to ensure universal understanding of the nature of the hazard. Please comply
with all warnings and markings to ensure safe use of the equipment.
These include but are not limited to:
a) Valve Operations b) Valve Identification
c) Outlet Descriptions d) Personal Protection recommendations
e) Personal dangers f) Equipment dangers
g) Maintenance instructions h) Fluid flow direction
SOME EXAMPLES FOUND ON THE EQUIPMENT
A
Valve Operations
Personal Protection
,
Read and understand O
p
erator’s manual and Maintenance manual
Outlet Descriptions
Fluid Flow Direction
Maintenance Instructions
Equipment Dangers
CLEAN FILTER DAILY
V
alve Identification
DRILL FLUID
FLOW TO
MIXER
FLOW TO
VALVE #B
MT-3X1500-51
BEFORE TRANSPORTING
- ALL Tanks MUST be Empty.
- SECURE Wheel Locks
WARNING
MT-3X1500-54
- Unit MUST be on the ground
and LEVELED with jacks,
BEFORE Filling with fluid
BEFORE OPERATING

11

12
MAC JR 1200E
Operators Manual
Congratulations on your acquisition of the MAC JR 1200 drill fluid mixing and recovery system.
You have acquired the most efficient fluid system manufactured, for mixing bentonite drilling slurry (mud)
and fluid recovery system on the market. As a manufacturer of drilling support equipment, we are well
aware of the extreme conditions that drilling equipment is exposed to on a daily basis. Surface To
Surface Inc. strives to overcome these conditions, with better design and manufacturing practices.
Please feel free to call our toll free number (1-800-567-0978) if you have any questions or concerns
about your system. Thank you, for choosing the MAC JR 1200 system.
The MAC Junior 1200 was designed to mix drilling fluid, clean and recycle used drill
fluid, and maintain proper drilling fluid in an active tank for the drilling rig. The MAC
Junior 1200 is built as one unit that includes 3 tanks, each with injector nozzles, a manifold
assembly of hydro-cyclones, a STS M2 mixer and all the valves and piping to needed to create
a smooth and effortless system.
The unit is designed to be operated on ground level. When the unit is to be transported it
is jacked up, letting the wheels rotate down and into position, were they are secured and
locked in place, creating 12” of ground clearance for transporting over uneven terrain. Once
on location, lower jacks and take the weight off of the wheels, release the locks and lower to
ground level.
The mixer located at the rear of the unit is designed around the time proven M series
mixers of STS.
The MAC Junior 1200E consists of an electric powered centrifugal pump, filter/shear
unit, venturi mixing tee assembly, dry hopper and pressure wash wand, making effective use
of the 4 point mixing system.
The hydro-cyclones are 2 1/2” with a capacity of 16 us. gpm each and a D-cut of 5
micron. As the fluid is processed with the hydro-cyclones, the over-flow (clean) fluid is routed
into the active tank for reuse.
For ease of interpretation, looking at the tongue (hitch) straight on will be considered looking
at the front of the unit. Hence the M2 mixer will be the rear and the sides will be right or left.
RECORD OF OWNERSHIP:
Unit Serial No. __________________________________________
Pump Serial No:_________________________________________
Date Purchased/Leased:___________________________________
Dealer Purchased/Leased From:_____________________________
Special Custom Features:__________________________________

13
REV.
DATE.DWR. NUM.
Surface to Surface Inc.
®
MAC JR 1200E
01 / 17 / 13
MAC JR 1200E
12"
73"
(work mode)
36"
(work mode)
86"
(transport mode)
(Transport mode) ** wheels down, tongue extended
(Work mode) ** wheels up, tongue retracted
96"
212"
25"
03 / 15 / 19

14
Surface to Surface Inc.
Features and Benefits: MAC Junior 1200E
The MAC Junior 1200E was designed to mix drilling fluid, clean and recycle used drill fluid, and maintain proper drilling
fluid in an active tank for the drilling rig. The MAC Junior 1200 is built as one unit that includes 3 tanks, a manifold assembly
of hydro-cyclones, a STS M2 mixer and all the valves and piping to needed to create a smooth and effortless system needed
to satisfy the customer’s needs.
The unit is designed to be operated on ground level with a tank height of 50 inches, so the operator can over-see the
process, and visually inspect inside of the tanks without ever having to climb up or down causing a safety issue. When the
unit is to be transported from location to location, the unit is jacked up with the 3 onboard jacks letting the wheels rotate down
and into position, were they are secured and locked in place. This creates 12” of ground clearance for transporting over
uneven terrain. Once on location, lower jacks and take the weight off of the wheels, release the locks and lower to ground
level.
The mixer located at the rear of the unit is designed around the time proven M series mixers of STS. The MAC Junior
1200E is powered by a 10HP Teco/Westinghouse electric motor, driving a 2” centrifugal pump, making effective use of the
renowned 4 point mixing system. With the proper valve selection, this one motor and pump will do all of the functions required
to operate the unit effectively and efficiently, thus reducing mechanical and maintenance issues.
With a hopper height of only 36” from the ground, operator fatigue from loading bags into the hopper is reduced.
The mixer blends and shears the new drilling fluid in the rear 300 us. gallon tank. A set of 5-1 injector nozzles in combination
with a rolled bottom tank design keeps the fluid agitated and consistent. When the operator has the proper drill fluid made,
simply rotate a valve on the mixing unit and route the fluid to the front active tank. The active tank will hold 600 us. gallons of
drilling fluid for the drilling rig to draw from. This tank is also designed with a rolled bottom and a set of 5-1 injector nozzles to
keep the fluid agitated and consistent.
The tank in the center of the unit has a capacity of 300us. gallons for storing “dirty, spent” drill fluid from the drill hole. This
tank is filled by a customer supplied pit pump usually of the 2” size. When the “dirty” tank is full, the pump on the mixer is used
to draw “dirty” fluid from the center tank and route it to the front mounted hydro-cyclones. While routing fluid to the hydro-
cyclones the pump also uses the “dirty” tank’s rolled bottom and set of 5-1 injector nozzles to keep the dirty fluid agitated and
consistent. The hydro-cyclones are 2 1/2” with a capacity of 16 us.gpm each and a D-cut of 5 micron. As the fluid is
processed with the hydro-cyclones, the over-flow (clean) fluid is routed into the active tank for reuse. The underflow (solids)
are routed out and away for customer disposal or optional secondary treatment.
Each tank is open top and has side clean out access. The tanks are equipped with the required inlet-outlet connections on
both sides of the tank to allow for better external hose routing and to eliminate hoses over the top and tied. The frame has
many securing and tie-down points located in key spots.
This unit was designed for operator safety, site safety, ease of use, portability, small footprint and maximizing
drilling fluid handling efficiency.
Mix-Clean-Recover Unit
Model MAC Junior 1200E
Electric
Unit shown with a M2-E922 mixer

15
Specifications MAC Junior 1200E Unit Benefits
Dimensions (Working) 96” W x 187” L x 72” H Small foot print operate from ground level
Dimensions (Transporting) 96” W x 212” L x 86” H 12” of ground clearance
Weight without Mixer 2500 lbs. Light weight for easy transportation.
Weight including Mixer 3000 lbs. (M2-E922)
Hopper Height & Size 36” High Holds ½ of a bag Low hopper height reduces back strain.
Hydro-cyclones 2@ 2 1/2” 16 gpm D-cut of 5 micron
Piping 2” sched. 40 Pipe Built tough for the construction trade.
Flow Valves Brass and Steel construction Withstand the abuse of daily operations
Quick coupling connectors 2” cam loc Ease of connections and draining
Tanks 2 @ 300us gal, 1 @ 600us gal Rolled bottom with clean out
Tank nozzles (4 per tank) Eductor Nozzles (5-1 fluid output) Fast and effective rolling and mixing action.
Threaded inlet & outlet ports 2” NPT Safe Proper connections, no hoses over the top
Leveling Jacks 3 HD screw jacks Allows for 3-point leveling of unit
Tires 23 / 8.5 x 12 x 6 ply Stand up to rugged terrain
Retractable tongue Retracts 24” under unit Smaller working footprint. Avoids tripping hazard.
Large storage area Caged with open top Keep hoses & accessories all in one place
Mixing System 2” StS Mixing System Fast & efficient with high shearing ability.
Optional Fluid Recovery from the Hydro-cyclone discharge is available.
Specifications M2-E922 Mixer Benefits
Dimensions 33” W x 52” L x 26 1/2” H Small space saving footprint.
Weight 500 lbs. (227 Kg) Light weight for easy transportation.
Hopper Height & Size 26 1/2” High Holds ½ of a bag Low hopper height reduces back strain.
Mixing System 2” Renowned StS Mixing System Fast & efficient with high shearing ability.
Flow Valves Brass and Steel construction Withstand the abuse of daily operations
Skid Frame 1” steel tube with lifting bale Built tough for the construction trade.
Motor 10 HP Teco 230V/460V 60Hz Industrial rated for longer service life
Pump 2” Cast iron centrifugal trash pump Gorman-Rupp 80 series
Pump / Motor Connection Bearing Block to Lovejoy® Coupler Large bearings & oversized coupler (service life)
Pipe Couplers Bolt & Snap-groove type Fast cold weather draining of system.
Pressure Wand Hopper maintenance wand Removal of build-up caused by additive.
Mechanical Seal Self Pressurizing Grease Seal Greaseable seal for more rugged working conditions
Replaceable Wear Plate Hardened plate ahead of Impeller Less wear on internal pump parts and is replaceable.
3-way Valves 2 1/2” NPT Port, 2 position Designed for heavy duty slurry use. Large handles.
With a 40 second viscosity, the M2 model produces 90 gpm @ 36psi through the mix nozzle and 52 gpm @ 36psi
to the tank nozzles (5-1 mixing equals 260 gpm of mixing / rolling action in tank) and a discharge rate of 80 gpm @
36psi
Also available in Hydraulic (MAC Junior 1200H) or Diesel (MAC Junior 1200D) models.
 All Specifications Subject to Change Without Notice 
Surface to Surface Inc.
Mix-Clean-Recover Unit
Model MAC Junior 1200E
Surface to Surface Inc.
5150 Forest Road, R.R.#3, Watford, Ontario, N0M 2S0
Tel: [phone]
Check our website for the latest products and specifications
www.stsmixers.com
03/15
/
19
Electric

16
MAC JR 1200E
Identifying Your Machine & Components
Location of Tags and PIN Plates

17
SECTION #II
Description, Care and Maintenance

18
MAC JR 1200E
Description, Care and Maintenance
Base Skid with Tanks
The base skid is built to support the 3 tanks and allow the unit to be transported from work site to work site
with a unique set of wheels that can be raised or lowered (Fig.1a) and a retractable tongue (Fig.1b) for
connecting to a transporting device. The base skid has various connecting points (D-rings) to attach a chain,
cable or strap, if the need arises. Maintenance of the base itself is minimal. It should be kept clean and a
visual inspection of the welds and tubing structure should be done on a daily bases. Connecting points (D-
rings) should also be checked for wear or damage before using. The retractable tongue should also be kept
clean to enable it to “retract” into the base skid. The hitch on the tongue will need to be checked for any
wear or damage that would render it un-safe for towing.
Mounted on each side of the base skid, is a rotating arm (Fig.1a) with a spindle hub and a rubber tire. On
top of the rotating arm is a sliding lock plate that stops the arm assembly from rotating while in the
transporting position. There is a grease fitting located on the end of each arm that should be greased on a
monthly basis. The sliding lock plate should be kept clean and free of debris to allow easy movement of the
plate back and forth.
The lug bolts that attach the wheel to the spindle should be checked daily and tightened if needed.
The air pressure in the tires should be checked regularly and maintained at the manufactures recommended
pressure, which is stated on the side wall of the tire. The bearings inside of the spindle should be serviced as
per the service schedule.
CAUTION
DONOTCONNECTCHAINS OR STRAPS
to piping or other parts of the unit.
D-Hooks are provided on the base
structure for suchuse.
Fig.1a Fig.1b
DANGER
NE VER ATTE MPT TO P UT
THE UNI T INTO OP ERATION
without lowering the unit to the ground
and leveling with the jacks.
Serious personal injurywill result.
DANGER
NEVER TRANSPORT
the unit without the wheel locks
engauged in the transport position,
the tongue extended and pinned
and the levelingjacks fullyretracted.

19
MAC JR 1200E
Description, Care and Maintenance
Base Skid with Tanks
There are 3 tanks atop of the base skid. The front tank is 600us. gal, and is referred to as the “active”
tank. The middle tank is 300us. gal and is referred to as the “dirty” tank. The back tank is also 300us. gal
and is referred to as the “mixing” tank.
Each tank is equipped with a removable clean out cover (Fig.2a), which is easily taken off by removing the
center bolt. There is a rubber gasket ring around the cover itself and this gasket should be cleaned before
reinstalling the cover back on the tank. Do not over-tighten.
The tanks should be checked regularly for any debris or sediment that may have accumulated on the bottom
and cleaned out before the next use.
Each tank has gallonage marker(s) (Fig.2b), mounted on the inside wall. The markers indicate US. gallons.
Tanks should never be filled above the top marker of the tank.
Fig.2b
Fig.2a
CAUTION
NEVER LEAVE LIQUIDIN THE
PIPING, HOSES OR TANK
during freezing weather conditions,
as damagewill result.
Followinstructionfor winterizing.
CAUTION
AVOID ALLOWINGFOREIGN MATERIAL
into the Tanks.
CAUTION
BEFORE STARTINGOR RESTARTING
the mixer, make sure the suctionvalve
on the proper tank is open, and the
fluid lev el in the tank is above
the suction port.

20
MAC JR 1200E
Description, Care and Maintenance
Base Skid with Tanks
The middle and back tanks have labeled inlet ports (Fig.3a, 3b), on both sides of the unit, to receive
the appropriate (labeled) fluid and should be used to make a safe and solid connection for the filling hoses.
It is recommended that the inlet port of the middle “Dirty” tank be protected with a screening device such as
the screening basket (supplied) (Fig.3c) to stop large debris from entering the tank, that may damage or plug
the hydro-cyclones. This filtering device should be cleaned on a daily basis.
The front “Active” tank has labeled discharge ports (Fig.3d) located on both sides, were the
connection for the drilling rig is to be made. A valve is mounted to this discharge port to stop the flow of
fluid from the tank.
With solid port connections available, there should be no need to have hoses draped over the top of
the tanks, creating an operator hazard.
Fig.3a Fig.3b
Fig.3d
CAUTION
TRAPPED FLUIDMAY BE PRESENT
and will spill out when piping or
hoses are removed.
WARNING
NEVER USE BODY PARTS,
OR FOREIGN OBJECTS
inan attempt to unplug or cleanthe
tank inlets or tank jetnozzels.
Serious personal inj ury or
damage will result.
CAUTION
CARE MUSTBE TAKEN WHEN
CONNECTING THE HOSE COUPLINGS.
The faces must be clean before mating
together. Rotate bodyto engauge lock.
Fig.3c