Multiquip ST-45HRM ST-45 Pump Operating Procedures, Operating Suggestions, Notremotely, Bearing

ST-45 PUMP — OPERATING PROCEDURES

OPERATING SUGGESTIONS

1.A well-planned location of the pump and routing of the hose beforestartingapourmaysavesubsequentmovesthrough- out the job.

2.Beforeconcreteisdischargedintothehopper,itissuggested that 3 to 4 gallons of water be sprayed into the hopper, followedbyapproximately5gallonsofacreamycementand water slurry (1/2 bag of cement to 5 gallons of water).This procedure lubricates the hose and prevents separation and blockages in the hose.

Getting the concrete to flow through

NOTE the hose at the start of the pumping cycle can be one of the most critical

operations of the pour. (Manually operate the throttle when starting,

NOTREMOTELY)

CAUTION If hoses or lines are blocked for any reason, or if the lines are kinked when starting up or during the pumping cycle, the pump pressure could straighten out the kink or force out the blockage. This rapid surge of material could cause the lines to whip or move in a manner that could cause injury to personnel.

Inspect the lines at all times to prevent the above conditions

3.It is important that once the slurry procedure is completed, and you have started concrete flowing through the hose, do not stop the pour until all the slurry is pumped out and the concrete has reached the end of the hose.The only time to stop the pump at the start is if a blockage occurs.

4.Whenthepumpisstoppedforanyreasonduringapour;e.g., movinghose,waitingforredi-mixtruck,thefollowingsugges- tions are offered:

A.Leave the hopper full of concrete at the time of shutdown.Itisimportantnottolettheredi-mixdriver wash too much water into the hopper, as this could cause separation of the concrete in the hopper.

B.Ifthe shutdownperiod exceeds 2 to 3 minutes, turn off the engine so the vibration does not separate the mix in the hopper which can cause a blockage in the manifold when the pump is started.

C.Ifitisnecessarytowait10minutesormoreforanother load of concrete, it is wise to start the pump and pump 6or8strokesevery5minutestopreventsettingofthe mixinthesystem.Ifwaitingtimeisexcessive,itwould bewisetowashoutthepumpandhosesandstartover when the new truck arrives.

D.When pumping stiff mixes and there is waiting time between redi-mix trucks, it is advisable to add some water to the last hopper of material and “hand mix” to ensure an easier start with the following load.

E.When the pumping job requires a stiffer mix, the following method is suggested for starting: Take a water hose with a nozzle on it and apply water with a fine spray to the concrete as it comes down the redi- mix chute into the pump hopper after the slurry procedure is completed and you are ready to start pumping.

Using this procedure will make it easier to pump through the clean hose. Note: Once the concrete has reached the end of the hose, do not apply any more water in this manner as this procedure is used for starting only.

F.Hose sizing is very important: We strongly recom- mend on harsh mixes, vertical pushes, stiff concrete, shotcrete, long pushes, that a 2 -1/2” line be used as faraspossible.Theadvantagesofusingthe2-1/2”line areimprovedpumpability,lesspumpingpressureand less wear on the pump.

5.Following the pump operation, proper wash out of all mate- rials or “build-up” within the pump manifold and hoses will prevent problems when starting the next job.

6.Athoroughinspectionofthedrivecomponentsandgreasing ofallbearingsaftereachjobwillensureadequatelubrication and service to the pump which is normally operating in wet, grittyconditions.

NOTE	Over-greasing any bearing on
	yourMaycopumpwillnotdamage
	the bearing.

PAGE 24 — MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04)