Index

A

accumulators (para 2-6)
bag-type (para 2-6b)
maintenance of (para 2-6d)
piston-type (para 2-6c)
spring-loaded (para2-6a)
actuator
air vents (para 4-3j)
American Standards Association (ASA) (para 6-2)
area (para 1-1b)
ASA. See American Standards Association (ASA)
assembling a clamp-type coupling (para 2-10d)
assembling a conductor (para 2-10d)

B

baffle plate (para 2-3f)
bends in tubing (para 2-9d)
Bernouilli's principle (para 1-4d)

C

camshaft (para 5-2d(1))
capacity (para 3-2)
centrifugal force (para 4-4b)
cfs. See cubic foot (feet) per second (cfs)
circuits
hydraulic-lift (para 6-3a)
mobile (para 6-3a)
operation problems in (para 6-4a)
power-steering (para 6-3b)
road-patrol-truck (para 6-3c)
testing (para 6-4b)
troubleshooting (para 6-4)
circulatory system (para 2-9)
requirements (para 2-9)
colors in figures (para 2-2)
connecting tubing (para 2-9d)
connectors (para 2-10)
flared (para 2-10b)
threaded (para 2-10a)
couplings (para 2-3f)
flexible-hose (para 2-10c)
cubic foot (feet) per second (cfs) (para 2-7)
cylinder block (para 3-8a(2)), (para 3-8a(5))
cylinder housing (para 4-1)
cylinder ports (para 4-2)
cylinders (para 4-1)
construction of (para 4-2)
cushioned (para 4-1g)
differential (para 4-1c)
double-acting (4-1b)
lockout (para 4-1h)
nondifferential (para 4-1d)
piston (para 4-1)
piston-type (para 4-1f)
problems with, abrasives on a piston rod (para 4-3h)
problems with, burrs on a piston rod (para 4-3i)
problems with, creeping (para 4-3c)
problems with, loose mounting (para 4-3e)
problems with, misalignment (para 4-3f)
problems with, no lubrication (para 4-3g)
problems with, sluggish operation (para 4-3d)
ram-type (para 4-1), (para 4-1e)
single-acting (para 4-1a)

D

dash number of tubing (para 2-9a)
delivery rate (para 3-2)
diagrams
hydraulic-circuit (para 6-1)
hydraulic-circuit, block (para 6-1a)
hydraulic-circuit, cutaway (para 6-1b)
diode (para 7-2b(5))
displacement (para 3-3), (para 4-4), (para 4-4c(1))
distance (para 1-2)
drive shaft (para 3-8b(1))

E

electrical equipment (para 7-4a)
practices (para 7-4b)
safety (para 7-4)
energy (para 1-4)
heat (para 1-4c)
kinetic (para 1-4b), (para 1-4d)
potential (para 1-4a), (para 1-4d

F

filters (para 2-4b)
active, absorbent (para 2-5)
element, depth-type (para 2-5)
element, edge-type (para 2-5)
element, surface-type (para 2-5)
full-flow (para 2-4b(1))
inactive, absorbent (para 2-5)
mechanical (para 2-5)
proportional-flow (para 2-4b(2))
fittings (para 2-10)
crosses (para 2-10b)
elbows (para 2-10b)
skived (para 2-10d)
unions (para 2-10b)
flared connectors leaking (para 2-10b)
flaring a tube (para 2-9d)
flow (para 1-3), (para 2-7), (para 3-1), (para 5-2c(2)), (para 5-2e)
laminar (para 1-4c)
turbulent (para 1-4c)
flow, pressure, and temperature (FPT) (para 6-4d)
fluid pressure (para 4-1f)
foot (feet) per second (fps) (para 1-3a)
foot-pound (ft lb) (para 1-4)
force (para 1-1b), (para 1-2)
fps. See foot (feet) per second (fps)
FPT. See flow, pressure, and temperature (FPT)
friction (para 1-4c), (para 1-4d)
ft lb. See foot-pound (ft lb)

G

gallon(s) per minute (GPM) (para 1-3b)
gas (para 1-1)
gauges
pressure (para 2-7)
GPM. See gallon(s) per minute (GPM)
gravity (para 4-1f)
ground (para 7-3)
chassis or common (para 7-3b)
earth (para 7-3a)
zero reference point (para 7-3c)

H

head (para 1-1a), (para 1-4c)
horsepower (HP) (para 1-4f), (para 2-1c(3))
hose (para 2-9c(1))
rubber (para 2-9c(1))
Teflon-type (para 2-9c(2))
HP. See horsepower (HP)
hydraulic balance (para 5-1)
hydraulic boost (para 6-3b)
hydraulic motors (para 4-4)
bent-axis piston-type (para 4-4c(2))
gear-type (para 4-4a)
in-line-axis piston-type (para 4-4c(1))
piston-type (para 4-4c)
principal ratings of (para 4-4)
vane-type (para 4-4b)
variable-displacement (para 4-4c(2))
hydraulic pump essentials (para 3-5)
hydraulic systems (para 2-1)
closed-center (para 2-1d), (para 2-1d), (para 2-1d)
hydraulic-jack (para 2-1a)
improperly operating (para 2-8b)
motor-reversing (para 2-1b)
open-center (para 2-1c)
problems with (para 6-4f)
solutions for (para 6-4g)
with fixed-displacement pump and accumulator (para 2-1d(1))
with flow divider (para 2-1c(3))
with series connection (para 2-1c(1))
with series/parallel connection (para 2-1c(2))
with variable-displacement pump (para 2-1c(2))
hydraulic transmission (para 4-4c(2))

I

ID. See inside diameter (ID)
inside diameter (ID) (para 2-9b)

J

JIC. See Joint Industry Conference (JIC)
Joint Industry Conference (JIC) (para 6-2)

L

leakage
external (para 2-11b), (para 4-3a)
in a hydraulic system (para 2-11)
internal (para 2-11a), (para 4-3b)
prevention of (para 2-11c)
prevention of by properly operating equipment (para 2-11c(2))
prevention of through maintenance of equipment (para 2-11c(3))
prevention of through proper installation of materials (para 2-11c(1))
lines in liquid-powered systems (para 2-9)
flexible hosing (para 2-9c)
piping (para 2-9b)
tubing (para 2-9a)
liquid (para 1-1a), (para 1-4c)
levels (para 1-1a(1))

M

metering (para 5-3)
meters (para 2-7b)
nutating-piston-disc type (para 2-7b)

O

OD. See outside diameter (OD)
O-ring (para 5-2a), (para 5-2e(1)), (para 5-23(2))
O-rings (para 2-12b(1))
outside diameter (OD) (para 2-9a)
override (para 5-1)

P

packing (para 2-12c)
Pascal's law (para 1-2)
pilot-valve assembly (para 5-1b(1))
pintle (para 3-8a(1))
pistons (para 3-8a(3))
Pitman arm (para 6-3b)
pivots (para 4-3)
port connections (para 6-2c)
potentiometer (para 7-2b(1))
pound(s) per square inch (psi) (para 1-1), (para 1-1a(2))
power (para 1-4f)
power-steering system (para 6-3b)
pressure (para 1-1), (para 1-1a), (para 2-7), (para 3-2), (para 4-4b), (para 5-1b), (para 5-1b(1))
atmospheric (para 1-1a), (para 1-1a(2)), (para 2-7a)
static (para 1-4c), (para 1-4d)
pressure plate (para 4-4b)
pressure switches (para 5-1e)
psi. (Emphasis>See pound(s) per square inch (psi)
psi. See pound(s) per square inch (psi)
pump
volute (para 3-5a)
pump cavitation (para 2-3d)
pumps
centrifugal (para 3-5a)
characteristics of (para 3-1c)
characteristics of vane-type (para 3-7a)
charging (para 2-1d(2))
design (para 3-5)
diffuser (para 3-5a(2))
displacement (para 3-8b(1)(a))
external gear (para 3-6a)
fixed-displacement (para 3-3a)
in-lin, operation of (para 3-8b(1)(c))
in-line, components of (para 3-8b(1)(b))
in-line, wobble-plate type (para 3-8b(2))
internal gear (para 3-6b)
lobe (para 3-6c)
nonpositive-displacement (para 3-1a)
operating problems, cavitation (para 3-9c)
operating problems, excess speed (para 3-9b)
operating problems, no delivery (para 3-9d(3))
operating problems, noise (para 3-9d(4))
operating problems, overloading (para 3-9)
operating problems, pressure loss (para 3-9d(1))
operating problems, slow operation (para 3-9d(2))
piston (para 3-8)
piston, axial-type (para 3-8b)
piston, bent-axis type (para 3-8b(3))
piston, in-line-type (para 3-8b(1))
piston, radial-type (para 3-8a)
positive-displacement (para 3-1b)
reciprocating (para 3-5c)
two-stage design (para 3-7e)
types of (para 3-a)
vane (para 3-7)
vane-type, balanced design (para 3-7c)
vane-type, double design (para 3-7d)
vane-type, unbalanced design (para 3-7b)
variable-displacement (para 3-3b)

R

relay (para 7-2b(3))
replacing hose (para 2-10c)
reservoir (para 2-3), (para 6-2a)
construction of (para 2-3a)
location of (para 2-3d)
shape of (para 2-3b)
size of (para 2-3c)
ventilation and pressurization of (para 2-3e)
reservoirs
line connections for (para 2-3f)
maintenance of (para 2-3g)
resistance (para 3-2), (para 5-1c)
revolution(s) per minute (rpm) (para 2-1d(2))
rings
backup (para 2-12b(2))
piston (para 2-12b(7))
rotors (para 3-8a(4))
rpm. See revolution(s) per minute (rpm)

S

seals (para 2-12), (para 4-2), (para 4-3)
cup (para 2-12b(6))
dynamic (para 2-12b)
face (para 2-12b(8))
lathe-cut (para 2-12b(3))
leather (para 2-12d(1))
lip (para 2-12b(5))
materials (para 2-12d)
neoprene (para 2-12d(4))
nitrile (para 2-12d(2))
nylon (para 2-12d(5))
silicone (para 2-12d(3))
static (para 2-12a)
T-ring (para 2-12b(4))
seizing in connectors (para 2-10a)
sleeve (para 2-10b)
slippage (para 3-2)
solenoid coil (para 7-2b(2))
spring tester (para 5-5b)
strainer (para 2-4a)
swash plate (para 3-8b(1)), (para 3-8b(1)(a)), (para 4-4c(1))
symbols
accumulator (para 6-2i)
cooler (para 6-2i)
cylinder (para 6-2e)
cylinder, cushioned (para 6-2e)
cylinder, double-acting (para 6-2e)
cylinder, double-end rod (para 6-2e)
cylinder, single-acting (para 6-2e)
drain line (para 6-2b)
flexible line (para 6-2b)
fluid conditioner (para 6-2i)
graphical, United States of American Standards Institute (USASI) (para 6-2)
hydraulic lines (para 6-2b)
motor (para 6-2d)
pilot line (para 6-2b)
pump (para 6-2c)
reservoir (para 6-2a)
valves, check (para 6-2f(3))
valves, counterbalance (para 6-2f(4)
valves, directional-control (para 6-2h)
valves, flow-control (para 6-2g)
valves, four-way (para 6-2h(2))
valves, mobile directional (para 6-2h(3)
valves, pressure-control (para 6-2f)
valves, pressure-reducing (para 6-2f(5))
valves, relief (para 6-2f(1))
valves, sequence (para 6-2f(2))
valves, unloading (para 6-2h(1))
working line (para 6-2b)

T

testers
hydraulic-circuit (para 2-8a)
testing devices for electical circuits. See potentiometer, solenoid coil, relay, transformer, diode
torque (para 4-4b), (para 4-4c(2))
transformer (para 7-2b(4))
troubleshooting procedures for electrical circuits (para 7-2a)
analyze the symptom (para 7-2a(2))
identify the symptom (para 7-2a(1))
isolate the faulty circuit (para 7-2a(4))
isolate the single faulty function (para 7-2a(3))
locate/verify the cause of the malfunction (para 7-2a(5))
tube installation (para 2-9d)
tube maintenance (para 2-9d)

U

USASI. See symbols
graphical, United States of American Standards Institute (USASI)

V

valves (para 2-1a)
assembly of (para 5-6)
check (para 5-2c)
check, elements of (para 5-2c)
check, orifice (para 5-3e)
check, pilot-operated (para 5-2c(3))
check, pilot-operated-type (para 5-2c(3))
check, restriction-type (para 5-2c(2))
check, standard-type (para 5-2c(1))
closed-center spool (para 5-2e(2))
compensated flow for (para 5-4d)
compound-relief-type (para 5-1a(2))
control (para 2-1c(1)), (para 2-1d), (para 2-1d(1))
counterbalance (para 5-1d)
directional-control (para 4-4c(2)), (para 5-2), (para 5-5c(1))
directional-control, creep or drift problem (para 5-7b)
directional-control, four-way (para 5-2e)
directional-control, four-way poppet-type (para 5-2e(1))
directional-control, four-way sliding-spool (para 5-2e(2))
directional-control, load-drop problem (para 5-7b)
directional-control, oil problem (para 5-7b)
directional-control, shifting problem (para 5-7b)
disassembling (para 5-5b)
dividing (para 3-7e)
failures (para 5-5)
flow equalizer (para 5-3f)
flow-control (para 5-3)
flow-control, bleed-off-circuit installation (para 5-4c)
flow-control, installation of (para 5-4)
flow-control, meter-in-circuit installation (para 5-4a)
flow-control, meter-out-circuit installation (para 5-4b)
gate (para 5-3a), (para 5-3b)
globe (para 5-3b)
inlet (para 3-5b)
manually operated four-way (para 5-2e(3))
needle (para 5-3b)
open-center spool (para 5-2e(2))
outlet (para 3-5c)
oxidation of (para 5-5)
pilot-operated four-way (para 5-2e(4))
poppet (para 5-2a)
poppet-type (para 5-2)
poppet-type four-way Para 5-2e(1))
pressure-control (para 2-3e), (para 5-1), (para 5-5c(3))
pressure-control, troubleshooting of (para 5-7a)
pressure-reducing (para 5-1b)
pressure-reducing, pressure problem (para 5-7a(2))
pressure-regulating (para 2-1d(2))
pressure-sequence, function problem (para 5-7a(3))
pressure-sequence, movement problem (para 5-7a(3))
pressure-sequence, secondary operation problem (para 5-7a(3))
relief (para 3-7d), (para 5-1a)
relief, adjustment and pressure problem (para 5-7a(1))
relief, bypass (para 2-4b(1))
relief, noise or chatter problem (para 5-7a(1))
relief, nonadjustable cartridge-type (para 5-5c(5))
relief, overheating problem (para 5-7a(1))
relief, pressure problem (para 5-7a(1))
relief, troubleshooting of (para 5-7a(1))
relief-type,internal design of (para 5-1a)
repairing (para 5-5c)
restrictor (para 5-3d)
rotary-spool-type (para 5-2)
seats and poppets (para 5-5c(4))
sequence (para 5-1c)
sequence, application of (para 5-1c)
servicing (para 5-5a)
simple-relief-type (para5-1a(1))
sliding-spool (para 5-2b)
sliding-spool-type (para 5-2)
solenoid-operated two-and four-way (para 5-2e(5))
troubleshooting of (para 5-7)
two-way (para 5-2d)
unloading-type, unloading problem (para 5-7a(4))
variations of flow-control (para 5-3)
volume-control (para 5-5c(2))
volume-control, flow-variation problem (para 5-7c)
volume-control, improper-flow problem (para 5-7c)
volume-control, oil-heating problem (para 5-7c)
volume-control, pressure problem (para 5-7c)
XC-series pressure-reducing (para 5-1b(2))
X-series pressure-reducing (para 5-1b(1))
velocity (para 1-3a), (para 1-4d)
venturi throat (para 2-4b(2))
volumetric output (para 3-2)

W

weight para 1-1a)
water (para 1-1a)
wipers (para 4-2)
work (para 1-4e)
working parts of a pump (para 3-8a)

Y

yoke (para3-8b(1)(c))


HOMEPAGE