Taylor TX180S, Руководство по обслуживанию

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Section 22E Section 22E
Accumulator Accumulator
Introduction. Introduction. The accumulator acts as a shock The accumulator acts as a shock
absorber in absorber in the hydraulic the hydraulic system. system. When the When the driv- driv-
en member of the hydraulic system stops sudden- en member of the hydraulic system stops sudden-
ly, it creates a pressure wave that travels back ly, it creates a pressure wave that travels back
through the s through the s ystem. ystem. This shock This shock wave can wave can devel- devel-
op peak pressures several times greater than nor- op peak pressures several times greater than nor-
mal working pressures and can be the source of mal working pressures and can be the source of
system failure. system failure. The gas The gas cushion in cushion in an accumula- an accumula-
tor will minimize this shock, protecting expensive tor will minimize this shock, protecting expensive
hydraulic components. hydraulic components.
Accumulators. Accumulators. There There are tw are tw o ac o ac cumulators cumulators
connected to connected to the manifold the manifold valve. valve. They store They store a a
volume of oil at pressure for brake application. volume of oil at pressure for brake application.
These accumulators are hydro-pneumatic piston These accumulators are hydro-pneumatic piston
type and are precharged with dry nitrogen to type and are precharged with dry nitrogen to
1,250 psi (86 bar) and 500 psi (35 bar). 1,250 psi (86 bar) and 500 psi (35 bar).
Checking Precharge. Checking Precharge. The precharge check The precharge check
should be performed periodically (refer to the should be performed periodically (refer to the
Preventive Maintenance Preventive Maintenance chart in the chart in the Appen- Appen-
dices dices for for precharge check precharge check interval). interval). Follow the Follow the
procedures listed below to check precharge (a procedures listed below to check precharge (a
charging kit is charging kit is available from Tay available from Tay lor, part number lor, part number
1000-503). 1000-503). See Illustration See Illustration 22E-1 for 22E-1 for charging kit. charging kit.
1. 1. T T o read a o read a nd adj nd adj ust t ust t he gas p he gas p res res sur sur e or “pre e or “pre - -
charge” pressure, all the hydraulic fluid must charge” pressure, all the hydraulic fluid must
be drained from the fluid side of the accumula- be drained from the fluid side of the accumula-
tor to zero hydraulic tor to zero hydraulic pressure. pressure. T T o accomplish o accomplish
this, let the lift cylinder down and hold lever in this, let the lift cylinder down and hold lever in
DOWN position for approximately one minute. DOWN position for approximately one minute.
2. 2. Rem Rem ove t ove t he v he v alv alv e gua e gua rd an rd an d cap d cap fro fro m the m the
accumulator. accumulator.
3. 3. Ens Ens ure t ure t hat t hat t he sh he sh aft o aft o f the ai f the ai r chu r chu ck (4 ck (4 ) is ) is
fully retracted by turning the bar handle coun- fully retracted by turning the bar handle coun-
terclockwise until it stops. terclockwise until it stops.
4. 4. Do no Do no t hav t hav e the c e the c har har ging h ging h ose ( ose ( 8) co 8) co nne nne cte cte d d
Charging The Accumulator Charging The Accumulator (Illustration 22E-1) (Illustration 22E-1) . .
Perform the following procedures to charge the Perform the following procedures to charge the
accumulator. accumulator.
 
 
Use only d Use only d ry nitrogen ry nitrogen to charge to charge the the
accumulator. accumulator.
 
When prechargi When prechargi ng, the ini ng, the ini tial 50 psi tial 50 psi (3.5 bar) (3.5 bar)
of dry nitrogen should be of dry nitrogen should be introduced slowly introduced slowly
into the into the accumulator accumulator . .
1. 1. Insta Insta ll t ll t he c he c hargin hargin g kit g kit (Illu (Illu strat strat ion 2 ion 2 2E-1) 2E-1) as as
explained in the explained in the Checking Precharge Checking Precharge proce- proce-
dures above. dures above.
2. 2. Con Con nec nec t the ch t the ch arg arg ing ki ing ki t to a nit t to a nit rog rog en bot en bot tle tle
with the charging hose (8). with the charging hose (8).
3. 3. Inf Inf lat lat e the acc e the acc umu umu lat lat or to the pr or to the pr edet edet erm erm ine ine d d
pressure by opening the valve on the nitrogen pressure by opening the valve on the nitrogen
bottle slowly, closing it occasionally to allow bottle slowly, closing it occasionally to allow
the needle of the pressure gauge (2) to settle the needle of the pressure gauge (2) to settle
into position giving an accurate pressure read- into position giving an accurate pressure read-
ing. ing.
4. 4. Whe Whe n th n th e pro e pro per p per p rec rec har har ge pr ge pr ess ess ure i ure i s s
reached, close the valve on the nitrogen reached, close the valve on the nitrogen
bottle. bottle.
5. 5. T T o rel o rel ease ease press press ure in ure in exces exces s of s of the d the d esired esired
precharge, slowly open the bleeder valve (6) precharge, slowly open the bleeder valve (6)
until the pressure drops to the desired level. until the pressure drops to the desired level.
6. 6. Rot Rot ate th ate th e bar han e bar han dle co dle co unt unt erc erc loc loc kwi kwi se to th se to th e e
full stop position, then disconnect the swivel full stop position, then disconnect the swivel
(7) from the adapter (3). (7) from the adapter (3).
7. 7. Rem Rem ove t ove t he air c he air c huc huc k (4) fr k (4) fr om th om th e acc e acc umu umu la- la-
tor valve stem. tor valve stem.
8 8 Che Che ck t ck t he va he va lve s lve s tem f tem f or le or le aks w aks w ith a s ith a s oap oap y y
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